diff --git a/src/Oms.Application/Dtos/Orders/ItfxGetFileBody.cs b/src/Oms.Application/Dtos/Orders/ItfxGetFileBody.cs
new file mode 100644
index 0000000..f97311c
--- /dev/null
+++ b/src/Oms.Application/Dtos/Orders/ItfxGetFileBody.cs
@@ -0,0 +1,27 @@
+namespace Oms.Application.Dtos.Orders;
+
+/// <summary>
+/// itfx getFile（ForwardWithSubscribe）标准请求体。
+/// </summary>
+public class ItfxGetFileBody
+{
+    /// <summary>
+    /// 客户单号。
+    /// </summary>
+    public string? ClientNo { get; set; }
+
+    /// <summary>
+    /// 跟踪号。
+    /// </summary>
+    public string? TrackNo { get; set; }
+
+    /// <summary>
+    /// 服务商单号。
+    /// </summary>
+    public string? ServiceNo { get; set; }
+
+    /// <summary>
+    /// 文件类型：下游面单=21，末端面单=31，POD=180。
+    /// </summary>
+    public int Type { get; set; }
+}
diff --git a/src/Oms.Application/Dtos/Orders/OrderDownstreamForwardDtos.cs b/src/Oms.Application/Dtos/Orders/OrderDownstreamForwardDtos.cs
index c69e78c..0ace4b1 100644
--- a/src/Oms.Application/Dtos/Orders/OrderDownstreamForwardDtos.cs
+++ b/src/Oms.Application/Dtos/Orders/OrderDownstreamForwardDtos.cs
@@ -1,5 +1,3 @@
-using Oms.Application.Dtos.Orders;
-
 namespace Oms.Application.Dtos.Orders;
 
 /// <summary>
@@ -43,3 +41,56 @@ public class OrderDownstreamForwardResult
     /// </summary>
     public string? TrackNo { get; set; }
 }
+
+/// <summary>
+/// 下游 getFile 入参。
+/// </summary>
+public class OrderDownstreamGetFileInput
+{
+    /// <summary>
+    /// 订单 Id。
+    /// </summary>
+    public int Id { get; set; }
+
+    /// <summary>
+    /// 文件类型：下游面单=21，末端面单=31，POD=180。
+    /// </summary>
+    public int Type { get; set; }
+}
+
+/// <summary>
+/// 下游 getFile 转发结果。
+/// </summary>
+public class OrderDownstreamGetFileResult
+{
+    public bool Success { get; set; }
+
+    public string SupplierCode { get; set; } = string.Empty;
+
+    public int Type { get; set; }
+
+    public string? FileType { get; set; }
+
+    public string Url { get; set; } = string.Empty;
+
+    public string RequestJson { get; set; } = string.Empty;
+
+    public int? StatusCode { get; set; }
+
+    public string ResponseBody { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 转存到自有 COS 后的公开地址。
+    /// </summary>
+    public string? StoredFileUrl { get; set; }
+
+    /// <summary>
+    /// 回写后的服务商单号（Data.serviceNo）。
+    /// </summary>
+    public string? DownstreamServiceNo { get; set; }
+
+    /// <summary>
+    /// 回写后的跟踪号（Data.trackNo）。
+    /// </summary>
+    public string? TrackNo { get; set; }
+}
diff --git a/src/Oms.Application/Integrations/Itfx/ItfxGetFileDataParser.cs b/src/Oms.Application/Integrations/Itfx/ItfxGetFileDataParser.cs
new file mode 100644
index 0000000..4764ab0
--- /dev/null
+++ b/src/Oms.Application/Integrations/Itfx/ItfxGetFileDataParser.cs
@@ -0,0 +1,171 @@
+using System.Text.Json;
+using Oms.Domain.OrdersAggregate.Consts;
+using Oms.Domain.OrdersAggregate.Entities;
+
+namespace Oms.Application.Integrations.Itfx;
+
+/// <summary>
+/// 解析 itfx getFile 成功响应中的 Data，并回写订单单号。
+/// </summary>
+internal static class ItfxGetFileDataParser
+{
+    public const string StandardCode = "getFile";
+
+    public const int TypeDownstreamLabel = 21;
+    public const int TypeLastMileLabel = 31;
+    public const int TypePod = 180;
+
+    public sealed class GetFileData
+    {
+        public string? ServiceNo { get; init; }
+
+        public string? TrackNo { get; init; }
+
+        public string? ClientNo { get; init; }
+
+        public string? Url { get; init; }
+
+        public int? Type { get; init; }
+    }
+
+    public static bool TryResolveFileType(int type, out string fileType)
+    {
+        fileType = type switch
+        {
+            TypeDownstreamLabel => OrderFileTypeCodes.DownstreamLabel,
+            TypeLastMileLabel => OrderFileTypeCodes.LastMileLabel,
+            TypePod => OrderFileTypeCodes.Pod,
+            _ => string.Empty
+        };
+        return !string.IsNullOrEmpty(fileType);
+    }
+
+    public static bool TryParse(string? responseBody, out GetFileData? data)
+    {
+        data = null;
+        if (string.IsNullOrWhiteSpace(responseBody))
+        {
+            return false;
+        }
+
+        try
+        {
+            using var doc = JsonDocument.Parse(responseBody);
+            var root = doc.RootElement;
+            if (root.ValueKind != JsonValueKind.Object)
+            {
+                return false;
+            }
+
+            if (!TryGetPropertyIgnoreCase(root, out var dataElement, "data", "Data")
+                || dataElement.ValueKind != JsonValueKind.Object)
+            {
+                return false;
+            }
+
+            data = new GetFileData
+            {
+                ServiceNo = ReadString(dataElement, "serviceNo", "ServiceNo"),
+                TrackNo = ReadString(dataElement, "trackNo", "TrackNo"),
+                ClientNo = ReadString(dataElement, "clientNo", "ClientNo"),
+                Url = ReadString(dataElement, "url", "Url"),
+                Type = ReadInt(dataElement, "type", "Type"),
+            };
+            return !string.IsNullOrWhiteSpace(data.ServiceNo)
+                   || !string.IsNullOrWhiteSpace(data.TrackNo)
+                   || !string.IsNullOrWhiteSpace(data.ClientNo)
+                   || !string.IsNullOrWhiteSpace(data.Url);
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    /// <summary>
+    /// 服务商单号 ← Data.serviceNo，跟踪号 ← Data.trackNo；空值不覆盖。
+    /// </summary>
+    public static bool ApplyToOrder(Order order, GetFileData data)
+    {
+        var changed = false;
+
+        if (!string.IsNullOrWhiteSpace(data.ServiceNo))
+        {
+            var value = data.ServiceNo.Trim();
+            if (!string.Equals(order.DownstreamServiceNo, value, StringComparison.Ordinal))
+            {
+                order.DownstreamServiceNo = value;
+                changed = true;
+            }
+        }
+
+        if (!string.IsNullOrWhiteSpace(data.TrackNo))
+        {
+            var value = data.TrackNo.Trim();
+            if (!string.Equals(order.TrackNo, value, StringComparison.Ordinal))
+            {
+                order.TrackNo = value;
+                changed = true;
+            }
+        }
+
+        return changed;
+    }
+
+    private static bool TryGetPropertyIgnoreCase(JsonElement root, out JsonElement value, params string[] names)
+    {
+        foreach (var name in names)
+        {
+            if (root.TryGetProperty(name, out value))
+            {
+                return true;
+            }
+        }
+
+        foreach (var prop in root.EnumerateObject())
+        {
+            foreach (var name in names)
+            {
+                if (prop.Name.Equals(name, StringComparison.OrdinalIgnoreCase))
+                {
+                    value = prop.Value;
+                    return true;
+                }
+            }
+        }
+
+        value = default;
+        return false;
+    }
+
+    private static string? ReadString(JsonElement root, params string[] names)
+    {
+        if (!TryGetPropertyIgnoreCase(root, out var prop, names))
+        {
+            return null;
+        }
+
+        return prop.ValueKind switch
+        {
+            JsonValueKind.String => prop.GetString()?.Trim(),
+            JsonValueKind.Number => prop.GetRawText(),
+            JsonValueKind.Null => null,
+            _ => null
+        };
+    }
+
+    private static int? ReadInt(JsonElement root, params string[] names)
+    {
+        if (!TryGetPropertyIgnoreCase(root, out var prop, names))
+        {
+            return null;
+        }
+
+        return prop.ValueKind switch
+        {
+            JsonValueKind.Number when prop.TryGetInt32(out var n) => n,
+            JsonValueKind.String when int.TryParse(prop.GetString(), out var n) => n,
+            _ => null
+        };
+    }
+}
diff --git a/src/Oms.Application/Messaging/OrderSideEffects/OrderAutoTriggerFireEventHandler.cs b/src/Oms.Application/Messaging/OrderSideEffects/OrderAutoTriggerFireEventHandler.cs
index 670c52e..bebb13f 100644
--- a/src/Oms.Application/Messaging/OrderSideEffects/OrderAutoTriggerFireEventHandler.cs
+++ b/src/Oms.Application/Messaging/OrderSideEffects/OrderAutoTriggerFireEventHandler.cs
@@ -1,6 +1,7 @@
 using Fake.DependencyInjection;
 using Fake.EventBus;
 using Fake.UnitOfWork;
+using Oms.Application.Messaging;
 using Microsoft.Extensions.Logging;
 using Oms.Application.Services.Orders.Issues;
 
@@ -26,7 +27,7 @@ public sealed class OrderAutoTriggerFireEventHandler(
             return;
         }
 
-        using var unitOfWork = unitOfWorkManager.Begin();
+        using var unitOfWork = unitOfWorkManager.Begin(OmsOutboxUnitOfWork.Transactional());
         try
         {
             await autoTriggerRuntimeService.FireByOrderIdAsync(
diff --git a/src/Oms.Application/Messaging/OrderSideEffects/OrderLifecycleTrackAppendEventHandler.cs b/src/Oms.Application/Messaging/OrderSideEffects/OrderLifecycleTrackAppendEventHandler.cs
index 2114097..f963a48 100644
--- a/src/Oms.Application/Messaging/OrderSideEffects/OrderLifecycleTrackAppendEventHandler.cs
+++ b/src/Oms.Application/Messaging/OrderSideEffects/OrderLifecycleTrackAppendEventHandler.cs
@@ -1,6 +1,7 @@
 using Fake.DependencyInjection;
 using Fake.EventBus;
 using Fake.UnitOfWork;
+using Oms.Application.Messaging;
 using Microsoft.Extensions.Logging;
 using Oms.Application.Integrations.SmallBagTrack;
 
@@ -24,7 +25,7 @@ public sealed class OrderLifecycleTrackAppendEventHandler(
             return;
         }
 
-        using var unitOfWork = unitOfWorkManager.Begin();
+        using var unitOfWork = unitOfWorkManager.Begin(OmsOutboxUnitOfWork.Transactional());
         try
         {
             await trackClient.AppendLifecycleTrackAsync(
diff --git a/src/Oms.Application/Messaging/ParcelCreate/OrderParcelCustoms9610UpsertEventHandler.cs b/src/Oms.Application/Messaging/ParcelCreate/OrderParcelCustoms9610UpsertEventHandler.cs
index bb292d2..5ce44e7 100644
--- a/src/Oms.Application/Messaging/ParcelCreate/OrderParcelCustoms9610UpsertEventHandler.cs
+++ b/src/Oms.Application/Messaging/ParcelCreate/OrderParcelCustoms9610UpsertEventHandler.cs
@@ -1,6 +1,7 @@
 using Fake.DependencyInjection;
 using Fake.EventBus;
 using Fake.UnitOfWork;
+using Oms.Application.Messaging;
 using Microsoft.Extensions.Logging;
 using Oms.Application.Services.Orders;
 using Oms.Domain.OrdersAggregate.Repositories;
@@ -21,7 +22,7 @@ public sealed class OrderParcelCustoms9610UpsertEventHandler(
         OrderParcelCustoms9610UpsertIntegrationEvent @event,
         CancellationToken cancellationToken)
     {
-        using var unitOfWork = unitOfWorkManager.Begin();
+        using var unitOfWork = unitOfWorkManager.Begin(OmsOutboxUnitOfWork.Transactional());
         var order = await orderRepository.FirstOrDefaultAsync(x => x.Id == @event.OrderId, cancellationToken);
         if (order == null)
         {
diff --git a/src/Oms.Application/Messaging/ParcelCreate/OrderParcelLabelGenerateEventHandler.cs b/src/Oms.Application/Messaging/ParcelCreate/OrderParcelLabelGenerateEventHandler.cs
index 8e29720..78936ca 100644
--- a/src/Oms.Application/Messaging/ParcelCreate/OrderParcelLabelGenerateEventHandler.cs
+++ b/src/Oms.Application/Messaging/ParcelCreate/OrderParcelLabelGenerateEventHandler.cs
@@ -1,6 +1,7 @@
 using Fake.DependencyInjection;
 using Fake.EventBus;
 using Fake.UnitOfWork;
+using Oms.Application.Messaging;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using Oms.Application.Services.Orders;
@@ -20,7 +21,7 @@ public sealed class OrderParcelLabelGenerateEventHandler(
         OrderParcelLabelGenerateIntegrationEvent @event,
         CancellationToken cancellationToken)
     {
-        using var unitOfWork = unitOfWorkManager.Begin();
+        using var unitOfWork = unitOfWorkManager.Begin(OmsOutboxUnitOfWork.Transactional());
         using var scope = scopeFactory.CreateScope();
         var orderService = scope.ServiceProvider.GetRequiredService<OrderService>();
         var result = await orderService.GenerateLabelPdfForBatchAsync(@event.OrderId, cancellationToken);
diff --git a/src/Oms.Application/Messaging/ParcelCreate/OrderParcelPickupAttachEventHandler.cs b/src/Oms.Application/Messaging/ParcelCreate/OrderParcelPickupAttachEventHandler.cs
index 488e95c..adcaf40 100644
--- a/src/Oms.Application/Messaging/ParcelCreate/OrderParcelPickupAttachEventHandler.cs
+++ b/src/Oms.Application/Messaging/ParcelCreate/OrderParcelPickupAttachEventHandler.cs
@@ -1,6 +1,7 @@
 using Fake.DependencyInjection;
 using Fake.EventBus;
 using Fake.UnitOfWork;
+using Oms.Application.Messaging;
 using Microsoft.Extensions.Logging;
 using Oms.Application.Dtos.Orders;
 using Oms.Application.Services.Orders;
@@ -21,7 +22,7 @@ public sealed class OrderParcelPickupAttachEventHandler(
         OrderParcelPickupAttachIntegrationEvent @event,
         CancellationToken cancellationToken)
     {
-        using var unitOfWork = unitOfWorkManager.Begin();
+        using var unitOfWork = unitOfWorkManager.Begin(OmsOutboxUnitOfWork.Transactional());
         try
         {
             await pickupOrderService.CreateForParcelInternalAsync(new PickupOrderCreateInput
diff --git a/src/Oms.Application/Messaging/ParcelCreate/OrderParcelTrackUpsertEventHandler.cs b/src/Oms.Application/Messaging/ParcelCreate/OrderParcelTrackUpsertEventHandler.cs
index 6347a3c..0fb3f89 100644
--- a/src/Oms.Application/Messaging/ParcelCreate/OrderParcelTrackUpsertEventHandler.cs
+++ b/src/Oms.Application/Messaging/ParcelCreate/OrderParcelTrackUpsertEventHandler.cs
@@ -2,6 +2,7 @@ using Fake.Application;
 using Fake.DependencyInjection;
 using Fake.EventBus;
 using Fake.UnitOfWork;
+using Oms.Application.Messaging;
 using Microsoft.Extensions.Logging;
 using Newtonsoft.Json;
 using Oms.Application.Integrations.SmallBagTrack;
@@ -24,7 +25,7 @@ public sealed class OrderParcelTrackUpsertEventHandler(
         OrderParcelTrackUpsertIntegrationEvent @event,
         CancellationToken cancellationToken)
     {
-        using var unitOfWork = unitOfWorkManager.Begin();
+        using var unitOfWork = unitOfWorkManager.Begin(OmsOutboxUnitOfWork.Transactional());
 
         var request = await ResolveRequestAsync(@event, cancellationToken);
         request.AppendInitialTrackOnSuccess = @event.AppendInitialTrackOnSuccess;
diff --git a/src/Oms.Application/Services/Orders/OrderFileManager.cs b/src/Oms.Application/Services/Orders/OrderFileManager.cs
index 3cf553b..356230a 100644
--- a/src/Oms.Application/Services/Orders/OrderFileManager.cs
+++ b/src/Oms.Application/Services/Orders/OrderFileManager.cs
@@ -3,6 +3,7 @@ using Fake.DependencyInjection;
 using Fake.ObjectStorage;
 using Microsoft.AspNetCore.Http;
 using Oms.Application.Dtos.Orders;
+using Oms.Application.Services.Storage;
 using Oms.Application.Storage;
 using Oms.Domain.OrdersAggregate.Consts;
 using Oms.Domain.OrdersAggregate.Entities;
@@ -15,7 +16,8 @@ namespace Oms.Application.Services.Orders;
 /// </summary>
 public sealed class OrderFileManager(
     IOrderFileRepository orderFileRepository,
-    IObjectStorage fileStorage) : IScopedDependency
+    IObjectStorage fileStorage,
+    IHttpClientFactory httpClientFactory) : IScopedDependency
 {
     private static readonly HashSet<string> ImageExt =
         new(StringComparer.OrdinalIgnoreCase) { ".jpg", ".jpeg", ".png", ".webp", ".gif", ".bmp" };
@@ -205,6 +207,162 @@ public sealed class OrderFileManager(
         return MapItem(saved);
     }
 
+    /// <summary>
+    /// 下载远端文件转存自有对象存储后写入订单附件。
+    /// </summary>
+    public async Task<OrderFileItemOutput> AddOrReplaceFromRemoteUrlAsync(
+        int orderId,
+        string fileType,
+        string remoteUrl,
+        int operatorUserId,
+        bool replaceExisting = true,
+        CancellationToken cancellationToken = default)
+    {
+        if (string.IsNullOrWhiteSpace(remoteUrl))
+        {
+            throw new BusinessException("下游文件地址为空");
+        }
+
+        if (!OrderFileTypeCodes.IsValid(fileType))
+        {
+            throw new BusinessException("不支持的附件类型");
+        }
+
+        var type = OrderFileTypeCodes.Normalize(fileType);
+        var sourceUrl = remoteUrl.Trim();
+        var stored = await DownloadAndStoreRemoteAsync(orderId, type, sourceUrl, cancellationToken);
+
+        if (replaceExisting)
+        {
+            await orderFileRepository.SoftDeleteByOrderAndTypeAsync(orderId, type, cancellationToken);
+        }
+        else
+        {
+            var existing = await orderFileRepository.GetByOrderAndTypeListAsync(orderId, type, cancellationToken);
+            var dup = existing.FirstOrDefault(x =>
+                string.Equals(x.FileUrl, stored.Key, StringComparison.OrdinalIgnoreCase)
+                || string.Equals(x.FileUrl, sourceUrl, StringComparison.OrdinalIgnoreCase));
+            if (dup != null)
+            {
+                return MapItem(dup);
+            }
+
+            if (existing.Count >= OrderFileTypeCodes.GetMaxCount(type))
+            {
+                var oldest = existing.OrderBy(x => x.Id).First();
+                oldest.IsDeleted = true;
+                oldest.UpdateTime = DateTime.Now;
+                await orderFileRepository.UpdateAsync(oldest, cancellationToken);
+            }
+        }
+
+        var existingAfter = replaceExisting
+            ? []
+            : await orderFileRepository.GetByOrderAndTypeListAsync(orderId, type, cancellationToken);
+        var entity = new OrderFile
+        {
+            OrderId = orderId,
+            FileType = type,
+            FileName = stored.FileName,
+            FileUrl = stored.Key,
+            ContentType = stored.ContentType,
+            FileSize = stored.Size,
+            Sort = existingAfter.Count,
+            Source = OrderFileSourceCodes.Downstream,
+            Remark = sourceUrl.Length > 500 ? sourceUrl[..500] : sourceUrl,
+            CreateUserId = operatorUserId,
+            CreateTime = DateTime.Now
+        };
+        var saved = await orderFileRepository.InsertAsync(entity, cancellationToken);
+        return MapItem(saved);
+    }
+
+    private async Task<(string Key, string? FileName, string? ContentType, long Size)> DownloadAndStoreRemoteAsync(
+        int orderId,
+        string fileType,
+        string remoteUrl,
+        CancellationToken cancellationToken)
+    {
+        byte[] bytes;
+        string? contentType;
+        try
+        {
+            var client = httpClientFactory.CreateClient(FileStorageService.UrlFetchClientName);
+            using var request = new HttpRequestMessage(HttpMethod.Get, remoteUrl);
+            request.Headers.TryAddWithoutValidation("Accept", "*/*");
+            using var response = await client.SendAsync(
+                request,
+                HttpCompletionOption.ResponseHeadersRead,
+                cancellationToken);
+            if (!response.IsSuccessStatusCode)
+            {
+                throw new BusinessException($"下载下游文件失败：HTTP {(int)response.StatusCode}");
+            }
+
+            bytes = await response.Content.ReadAsByteArrayAsync(cancellationToken);
+            contentType = response.Content.Headers.ContentType?.MediaType;
+        }
+        catch (BusinessException)
+        {
+            throw;
+        }
+        catch (Exception ex)
+        {
+            throw new BusinessException($"下载下游文件失败：{ex.Message}");
+        }
+
+        if (bytes.Length == 0)
+        {
+            throw new BusinessException("下游文件内容为空");
+        }
+
+        if (bytes.Length > MaxPdfBytes)
+        {
+            throw new BusinessException("下游文件不能超过 10MB");
+        }
+
+        var ext = GuessExtension(remoteUrl, contentType);
+        var fileName = TryFileNameFromUrl(remoteUrl) ?? $"{fileType}{ext}";
+        var storedName = $"{Guid.NewGuid():N}{ext}";
+        var relativeKey = $"uploads/order-files/{orderId}/{fileType}/{storedName}";
+        await using var stream = new MemoryStream(bytes);
+        var key = await fileStorage.SaveObjectAsync(stream, relativeKey, contentType, cancellationToken);
+        return (key, fileName, contentType, bytes.Length);
+    }
+
+    private static string GuessExtension(string url, string? contentType)
+    {
+        var fromUrl = Path.GetExtension(
+            (url.Contains('?', StringComparison.Ordinal)
+                ? url[..url.IndexOf('?', StringComparison.Ordinal)]
+                : url));
+        if (!string.IsNullOrWhiteSpace(fromUrl) && fromUrl.Length <= 8)
+        {
+            return fromUrl.ToLowerInvariant();
+        }
+
+        if (!string.IsNullOrWhiteSpace(contentType))
+        {
+            if (contentType.Contains("pdf", StringComparison.OrdinalIgnoreCase))
+            {
+                return ".pdf";
+            }
+
+            if (contentType.Contains("png", StringComparison.OrdinalIgnoreCase))
+            {
+                return ".png";
+            }
+
+            if (contentType.Contains("jpeg", StringComparison.OrdinalIgnoreCase)
+                || contentType.Contains("jpg", StringComparison.OrdinalIgnoreCase))
+            {
+                return ".jpg";
+            }
+        }
+
+        return ".pdf";
+    }
+
     public async Task<List<OrderFileItemOutput>> UploadAsync(
         int orderId,
         string fileType,
diff --git a/src/Oms.Application/Services/Orders/OrderService.BatchJob.cs b/src/Oms.Application/Services/Orders/OrderService.BatchJob.cs
index 61120b2..13dafbf 100644
--- a/src/Oms.Application/Services/Orders/OrderService.BatchJob.cs
+++ b/src/Oms.Application/Services/Orders/OrderService.BatchJob.cs
@@ -1,5 +1,6 @@
 using Fake.Application;
 using Fake.Security.Claims;
+using Fake.UnitOfWork;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
 using Oms.Application.Dtos.Orders;
@@ -21,6 +22,7 @@ public partial class OrderService
     /// 创建订单批量异步任务并入队 RabbitMQ。
     /// </summary>
     [HttpPost("/order/batch/jobs")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> CreateBatchJobAsync([FromBody] OrderBatchJobCreateInput input)
     {
         return BatchJobCoordinator.CreateAndEnqueueAsync(input, CurrentUser.GetId<int>());
@@ -73,6 +75,7 @@ public partial class OrderService
     /// 异步批量创建轨迹订单（替代前端逐条调用）。
     /// </summary>
     [HttpPost("/order/batch/track-upsert")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> BatchTrackUpsertAsync([FromBody] OrderBatchJobCreateInput input)
     {
         input.Action = OrderBatchActionCodes.TrackUpsertSmallBag;
@@ -94,6 +97,7 @@ public partial class OrderService
     /// 异步批量预报下游订单。
     /// </summary>
     [HttpPost("/order/batch/downstream-forward")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> BatchDownstreamForwardAsync([FromBody] OrderBatchJobCreateInput input)
     {
         input.Action = OrderBatchActionCodes.DownstreamForwardCreateOne;
@@ -111,6 +115,7 @@ public partial class OrderService
             string.IsNullOrWhiteSpace(authorization) ? null : authorization);
     }
 
+    [UnitOfWork(IsTransactional = true)]
     private Task<OrderBatchJobOutput> EnqueueOrderBatchAsync(string action, OrderBatchJobCreateInput input)
     {
         input.Action = action;
@@ -121,6 +126,7 @@ public partial class OrderService
     /// 异步批量支付订单。
     /// </summary>
     [HttpPost("/order/batch/pay")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> BatchPayAsync([FromBody] OrderBatchJobCreateInput input) =>
         EnqueueOrderBatchAsync(OrderBatchActionCodes.Pay, input);
 
@@ -128,6 +134,7 @@ public partial class OrderService
     /// 异步批量预报订单。
     /// </summary>
     [HttpPost("/order/batch/pre-declare")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> BatchPreDeclareAsync([FromBody] OrderBatchJobCreateInput input) =>
         EnqueueOrderBatchAsync(OrderBatchActionCodes.PreDeclare, input);
 
@@ -135,6 +142,7 @@ public partial class OrderService
     /// 异步批量拦截订单。
     /// </summary>
     [HttpPost("/order/batch/intercept")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> BatchInterceptAsync([FromBody] OrderBatchJobCreateInput input) =>
         EnqueueOrderBatchAsync(OrderBatchActionCodes.Intercept, input);
 
@@ -142,6 +150,7 @@ public partial class OrderService
     /// 异步批量取消拦截。
     /// </summary>
     [HttpPost("/order/batch/cancel-intercept")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> BatchCancelInterceptAsync([FromBody] OrderBatchJobCreateInput input) =>
         EnqueueOrderBatchAsync(OrderBatchActionCodes.CancelIntercept, input);
 
@@ -149,6 +158,7 @@ public partial class OrderService
     /// 异步批量删除订单。
     /// </summary>
     [HttpPost("/order/batch/delete")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> BatchDeleteAsync([FromBody] OrderBatchJobCreateInput input) =>
         EnqueueOrderBatchAsync(OrderBatchActionCodes.Delete, input);
 
@@ -156,6 +166,7 @@ public partial class OrderService
     /// 异步批量打印面单。
     /// </summary>
     [HttpPost("/order/batch/print")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> BatchPrintAsync([FromBody] OrderBatchJobCreateInput input) =>
         EnqueueOrderBatchAsync(OrderBatchActionCodes.Print, input);
 
@@ -163,6 +174,7 @@ public partial class OrderService
     /// 异步批量标记问题件。
     /// </summary>
     [HttpPost("/order/batch/mark-problematic")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> BatchMarkProblematicAsync([FromBody] OrderBatchJobCreateInput input) =>
         EnqueueOrderBatchAsync(OrderBatchActionCodes.MarkProblematic, input);
 
@@ -170,6 +182,7 @@ public partial class OrderService
     /// 异步批量重新排货。
     /// </summary>
     [HttpPost("/order/batch/reallocate")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> BatchReallocateAsync([FromBody] OrderBatchJobCreateInput input) =>
         EnqueueOrderBatchAsync(OrderBatchActionCodes.Reallocate, input);
 
@@ -177,6 +190,7 @@ public partial class OrderService
     /// 异步批量标记已认领。
     /// </summary>
     [HttpPost("/order/batch/mark-claimed")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> BatchMarkClaimedAsync([FromBody] OrderBatchJobCreateInput input) =>
         EnqueueOrderBatchAsync(OrderBatchActionCodes.MarkClaimed, input);
 
@@ -184,6 +198,7 @@ public partial class OrderService
     /// 异步批量更新处理状态。
     /// </summary>
     [HttpPost("/order/batch/handle-status-update")]
+    [UnitOfWork(IsTransactional = true)]
     public Task<OrderBatchJobOutput> BatchHandleStatusUpdateAsync([FromBody] OrderBatchJobCreateInput input) =>
         EnqueueOrderBatchAsync(OrderBatchActionCodes.HandleStatusUpdate, input);
 
diff --git a/src/Oms.Application/Services/Orders/OrderService.DownstreamForward.cs b/src/Oms.Application/Services/Orders/OrderService.DownstreamForward.cs
index b8eb919..4c74d7c 100644
--- a/src/Oms.Application/Services/Orders/OrderService.DownstreamForward.cs
+++ b/src/Oms.Application/Services/Orders/OrderService.DownstreamForward.cs
@@ -1,5 +1,6 @@
 using Fake.Application;
 using Fake.Domain.Exceptions;
+using Fake.UnitOfWork;
 using Microsoft.AspNetCore.Mvc;
 using Oms.Application.Dtos.Orders;
 using Oms.Application.Integrations.Itfx;
@@ -36,6 +37,7 @@ public partial class OrderService
     /// 按订单 Id 组装 createOrderOne 并转发至 itfx 下游。
     /// </summary>
     [HttpPost("/order/downstream-forward-create-one")]
+    [UnitOfWork(IsTransactional = true)]
     public async Task<OrderDownstreamForwardResult> DownstreamForwardCreateOneAsync([FromBody] OrderActionInput input)
     {
         var (order, body) = await LoadDownstreamCreateOneContextAsync(input.Id);
@@ -82,6 +84,72 @@ public partial class OrderService
         };
     }
 
+    /// <summary>
+    /// 按订单 Id 组装 getFile 并转发至 itfx 下游；成功时转存文件并回写单号。
+    /// </summary>
+    [HttpPost("/order/downstream-forward-get-file")]
+    public async Task<OrderDownstreamGetFileResult> DownstreamForwardGetFileAsync(
+        [FromBody] OrderDownstreamGetFileInput input)
+    {
+        if (!ItfxGetFileDataParser.TryResolveFileType(input.Type, out var fileType))
+        {
+            throw new BusinessException("不支持的文件类型，请选择下游面单/末端面单/POD");
+        }
+
+        var order = await GetOrderOrThrowAsync(input.Id);
+        var creds = await OrderDownstreamCredentialResolver.ResolveAsync(order);
+        var body = new ItfxGetFileBody
+        {
+            ClientNo = order.ClientNo?.Trim() ?? string.Empty,
+            TrackNo = order.TrackNo?.Trim() ?? string.Empty,
+            ServiceNo = order.DownstreamServiceNo?.Trim() ?? string.Empty,
+            Type = input.Type
+        };
+
+        var forward = await ItfxForwardClient.ForwardWithSubscribeAsync(
+            ItfxGetFileDataParser.StandardCode,
+            creds.SupplierCode,
+            creds.AppKey,
+            creds.AppSecret,
+            body);
+
+        string? storedFileUrl = null;
+        if (forward.Success
+            && ItfxGetFileDataParser.TryParse(forward.ResponseBody, out var data)
+            && data != null)
+        {
+            if (ItfxGetFileDataParser.ApplyToOrder(order, data))
+            {
+                await OrderRepository.UpdateAsync(order);
+            }
+
+            if (!string.IsNullOrWhiteSpace(data.Url))
+            {
+                var saved = await OrderFileManager.AddOrReplaceFromRemoteUrlAsync(
+                    order.Id,
+                    fileType,
+                    data.Url!,
+                    CurrentUser.IsAuthenticated ? CurrentUser.GetId<int>() : 0);
+                storedFileUrl = saved.FileUrl;
+            }
+        }
+
+        return new OrderDownstreamGetFileResult
+        {
+            Success = forward.Success,
+            SupplierCode = creds.SupplierCode,
+            Type = input.Type,
+            FileType = fileType,
+            Url = forward.Url,
+            RequestJson = forward.RequestJson,
+            StatusCode = forward.StatusCode,
+            ResponseBody = forward.ResponseBody,
+            StoredFileUrl = storedFileUrl,
+            DownstreamServiceNo = order.DownstreamServiceNo,
+            TrackNo = order.TrackNo,
+        };
+    }
+
     private async Task<(Domain.OrdersAggregate.Entities.Order order, ItfxCreateOrderOneBody body)> LoadDownstreamCreateOneContextAsync(
         int orderId)
     {