diff --git a/src/Oms.Application/Integrations/SmallBagTrack/SmallBagTrackUpsertRequestBuilder.cs b/src/Oms.Application/Integrations/SmallBagTrack/SmallBagTrackUpsertRequestBuilder.cs
index 7b79ebe..19eef09 100644
--- a/src/Oms.Application/Integrations/SmallBagTrack/SmallBagTrackUpsertRequestBuilder.cs
+++ b/src/Oms.Application/Integrations/SmallBagTrack/SmallBagTrackUpsertRequestBuilder.cs
@@ -67,16 +67,11 @@ internal sealed class SmallBagTrackUpsertRequestBuilder(
         };
     }
 
-    internal static string ResolveTrackNo(Order order)
-    {
-        var trackNo = order.TrackNo?.Trim();
-        if (!string.IsNullOrWhiteSpace(trackNo))
-        {
-            return trackNo;
-        }
-
-        return order.ServiceNo?.Trim() ?? string.Empty;
-    }
+    /// <summary>
+    /// 仅取运单跟踪号；无值则空串，不回落运单号/客户单号等。
+    /// </summary>
+    internal static string ResolveTrackNo(Order order) =>
+        order.TrackNo?.Trim() ?? string.Empty;
 
     internal static string? PickSupplierCodeFromProviders(
         IEnumerable<SalesProductAllocationProviderSnapshotDto> providers,
diff --git a/src/Oms.Application/Services/Orders/Batch/OrderBatchActionExecutor.cs b/src/Oms.Application/Services/Orders/Batch/OrderBatchActionExecutor.cs
index b5c9283..1c0ef56 100644
--- a/src/Oms.Application/Services/Orders/Batch/OrderBatchActionExecutor.cs
+++ b/src/Oms.Application/Services/Orders/Batch/OrderBatchActionExecutor.cs
@@ -6,6 +6,7 @@ using Oms.Application.Dtos.Orders;
 using Oms.Application.Integrations.Itfx;
 using Oms.Application.Integrations.SmallBagTrack;
 using Oms.Application.Messaging;
+using Oms.Application.Messaging.ParcelCreate;
 using Oms.Application.Shared;
 using Oms.Application.Storage;
 using Oms.Domain.ChannelsAggregate.Repositories;
@@ -23,6 +24,7 @@ public sealed class OrderBatchActionExecutor(
     IObjectStorage fileStorage,
     ISmallBagTrackOrderClient smallBagTrackOrderClient,
     ISmallBagTrackUpsertRequestBuilder smallBagTrackUpsertRequestBuilder,
+    IOrderParcelCreateEventPublisher parcelCreateEventPublisher,
     OrderDownstreamCredentialResolver downstreamCredentialResolver,
     IItfxForwardClient itfxForwardClient,
     OrderFileManager orderFileManager,
@@ -231,9 +233,31 @@ public sealed class OrderBatchActionExecutor(
             if (ItfxCreateOrderOneDataParser.TryParse(forward.ResponseBody, out var data)
                 && data != null)
             {
+                var previousTrackNo = order.TrackNo;
                 if (ItfxCreateOrderOneDataParser.ApplyToOrder(order, data))
                 {
                     await orderRepository.UpdateAsync(order, cancellationToken);
+
+                    var nextTrackNo = order.TrackNo?.Trim() ?? string.Empty;
+                    var prevTrackNo = previousTrackNo?.Trim() ?? string.Empty;
+                    if (!string.IsNullOrWhiteSpace(nextTrackNo)
+                        && !string.Equals(nextTrackNo, prevTrackNo, StringComparison.Ordinal))
+                    {
+                        var trackRequest = await smallBagTrackUpsertRequestBuilder.BuildAsync(
+                            order,
+                            cancellationToken: cancellationToken);
+                        trackRequest.AppendInitialTrackOnSuccess = true;
+                        if (!string.IsNullOrWhiteSpace(authorization))
+                        {
+                            trackRequest.Authorization = authorization.Trim();
+                        }
+
+                        await parcelCreateEventPublisher.PublishTrackUpsertAsync(
+                            order,
+                            trackRequest,
+                            customerId: order.CustomerId,
+                            cancellationToken);
+                    }
                 }
 
                 if (!string.IsNullOrWhiteSpace(data.LabelUrl))
diff --git a/src/Oms.Application/Services/Orders/OrderService.DownstreamForward.cs b/src/Oms.Application/Services/Orders/OrderService.DownstreamForward.cs
index 4c74d7c..37934fc 100644
--- a/src/Oms.Application/Services/Orders/OrderService.DownstreamForward.cs
+++ b/src/Oms.Application/Services/Orders/OrderService.DownstreamForward.cs
@@ -57,9 +57,11 @@ public partial class OrderService
             && ItfxCreateOrderOneDataParser.TryParse(forward.ResponseBody, out var data)
             && data != null)
         {
+            var previousTrackNo = order.TrackNo;
             if (ItfxCreateOrderOneDataParser.ApplyToOrder(order, data))
             {
                 await OrderRepository.UpdateAsync(order);
+                await EnqueueSmallBagTrackUpsertWhenTrackNoChangedAsync(order, previousTrackNo);
             }
 
             if (!string.IsNullOrWhiteSpace(data.LabelUrl))
@@ -118,9 +120,11 @@ public partial class OrderService
             && ItfxGetFileDataParser.TryParse(forward.ResponseBody, out var data)
             && data != null)
         {
+            var previousTrackNo = order.TrackNo;
             if (ItfxGetFileDataParser.ApplyToOrder(order, data))
             {
                 await OrderRepository.UpdateAsync(order);
+                await EnqueueSmallBagTrackUpsertWhenTrackNoChangedAsync(order, previousTrackNo);
             }
 
             if (!string.IsNullOrWhiteSpace(data.Url))
diff --git a/src/Oms.Application/Services/Orders/OrderService.OrderEdit.cs b/src/Oms.Application/Services/Orders/OrderService.OrderEdit.cs
index 076e3f3..6b43287 100644
--- a/src/Oms.Application/Services/Orders/OrderService.OrderEdit.cs
+++ b/src/Oms.Application/Services/Orders/OrderService.OrderEdit.cs
@@ -48,6 +48,7 @@ public partial class OrderService
             order.ClientNo = newClientNo;
         }
 
+        var previousTrackNo = order.TrackNo;
         if (input.TrackNo != null)
         {
             order.TrackNo = string.IsNullOrWhiteSpace(input.TrackNo) ? null : input.TrackNo.Trim();
@@ -155,6 +156,11 @@ public partial class OrderService
             afterSnap,
             remark);
 
+        if (input.TrackNo != null)
+        {
+            await EnqueueSmallBagTrackUpsertWhenTrackNoChangedAsync(order, previousTrackNo);
+        }
+
         return (await MapOrderOutputsAsync([order])).First();
     }
 
diff --git a/src/Oms.Application/Services/Orders/OrderService.ParcelBilling.cs b/src/Oms.Application/Services/Orders/OrderService.ParcelBilling.cs
index e2e7fa6..9d3b15a 100644
--- a/src/Oms.Application/Services/Orders/OrderService.ParcelBilling.cs
+++ b/src/Oms.Application/Services/Orders/OrderService.ParcelBilling.cs
@@ -3201,6 +3201,25 @@ public partial class OrderService
         await ParcelCreateEventPublisher.PublishTrackUpsertAsync(order, request, customer?.Id);
     }
 
+    /// <summary>
+    /// 跟踪号相对旧值有变更且新值非空时，再创建/更新一次轨迹订单。
+    /// </summary>
+    private async Task EnqueueSmallBagTrackUpsertWhenTrackNoChangedAsync(
+        Order order,
+        string? previousTrackNo,
+        bool appendInitialTrack = true)
+    {
+        var next = order.TrackNo?.Trim() ?? string.Empty;
+        var prev = previousTrackNo?.Trim() ?? string.Empty;
+        if (string.IsNullOrWhiteSpace(next)
+            || string.Equals(next, prev, StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        await EnqueueSmallBagTrackUpsertAsync(order, customer: null, receiver: null, appendInitialTrack);
+    }
+
     private async Task EnqueueLifecycleTrackAppendAsync(Order order, string trackCode)
     {
         if (string.IsNullOrWhiteSpace(order.ServiceNo))
diff --git a/src/Oms.Tests/SmallBagTrackUpsertRequestBuilderTests.cs b/src/Oms.Tests/SmallBagTrackUpsertRequestBuilderTests.cs
index 4be8521..df70e79 100644
--- a/src/Oms.Tests/SmallBagTrackUpsertRequestBuilderTests.cs
+++ b/src/Oms.Tests/SmallBagTrackUpsertRequestBuilderTests.cs
@@ -20,7 +20,7 @@ public class SmallBagTrackUpsertRequestBuilderTests
     }
 
     [Fact]
-    public void ResolveTrackNo_FallsBackToServiceNoWhenTrackNoEmpty()
+    public void ResolveTrackNo_EmptyWhenTrackNoMissing()
     {
         var order = new Order
         {
@@ -28,7 +28,7 @@ public class SmallBagTrackUpsertRequestBuilderTests
             TrackNo = null
         };
 
-        Assert.Equal("IDE2607221859123456", SmallBagTrackUpsertRequestBuilder.ResolveTrackNo(order));
+        Assert.Equal(string.Empty, SmallBagTrackUpsertRequestBuilder.ResolveTrackNo(order));
     }
 
     [Fact]