diff --git a/src/Oms.Application/Dtos/Orders/OrderChangePostShipStatusInput.cs b/src/Oms.Application/Dtos/Orders/OrderChangePostShipStatusInput.cs
new file mode 100644
index 0000000..3babb24
--- /dev/null
+++ b/src/Oms.Application/Dtos/Orders/OrderChangePostShipStatusInput.cs
@@ -0,0 +1,29 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Oms.Application.Dtos.Orders;
+
+/// <summary>
+/// 出库后状态校正入参：仅允许在待上网 / 运输中 / 派送成功 / 派送失败之间变更；派送成功只进不出。
+/// </summary>
+public class OrderChangePostShipStatusInput
+{
+    /// <summary>
+    /// 订单主键。
+    /// </summary>
+    [Required]
+    public int Id { get; set; }
+
+    /// <summary>
+    /// 目标订单状态（pendingOnline / shipping / deliverySuccess / deliveryFailed）。
+    /// </summary>
+    [Required]
+    [StringLength(32)]
+    public string TargetStatus { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 变更备注（必填，落操作日志）。
+    /// </summary>
+    [Required]
+    [StringLength(512)]
+    public string Remark { get; set; } = string.Empty;
+}
diff --git a/src/Oms.Application/Services/Orders/OrderService.cs b/src/Oms.Application/Services/Orders/OrderService.cs
index ced7591..9f6dd5a 100644
--- a/src/Oms.Application/Services/Orders/OrderService.cs
+++ b/src/Oms.Application/Services/Orders/OrderService.cs
@@ -237,7 +237,101 @@ public partial class OrderService : ApplicationService
         order.OrderStatus = OrderStatusCodes.DeliverySuccess;
         order.SignTime = DateTime.Now;
         await UpdateOrderAsync(order);
+        await ApplyDeliverySuccessMarketingAsync(order);
+    }
 
+    /// <summary>
+    /// 出库后状态校正：仅待上网 / 运输中 / 派送成功 / 派送失败互改；派送成功只进不出。
+    /// 目标为派送成功时同步 SignTime 并触发引荐分成 / 首签券（与 mark-delivery-success 一致）。
+    /// </summary>
+    /// <param name="input">订单 Id、目标状态、必填备注。</param>
+    [HttpPost("/order/change-post-ship-status")]
+    [UnitOfWork(IsTransactional = true, IsolationLevel = IsolationLevel.ReadCommitted)]
+    public async Task ChangePostShipStatusAsync([FromBody] OrderChangePostShipStatusInput input)
+    {
+        var target = NormalizePostShipStatus(input.TargetStatus);
+        if (target == null)
+        {
+            throw new BusinessException("目标状态仅支持：待上网、运输中、派送成功、派送失败");
+        }
+
+        var remark = input.Remark?.Trim();
+        if (string.IsNullOrWhiteSpace(remark))
+        {
+            throw new BusinessException("请填写变更备注");
+        }
+
+        var order = await GetOrderOrThrowAsync(input.Id);
+        var fromStatus = order.OrderStatus?.Trim() ?? string.Empty;
+        if (!IsPostShipChangeableStatus(fromStatus))
+        {
+            throw new BusinessException(
+                $"订单状态为「{OmsDocHelper.GetOrderStatusName(fromStatus)}」，仅出库后状态可校正");
+        }
+
+        if (string.Equals(fromStatus, OrderStatusCodes.DeliverySuccess, StringComparison.OrdinalIgnoreCase))
+        {
+            throw new BusinessException("派送成功不可回退");
+        }
+
+        if (string.Equals(fromStatus, target, StringComparison.OrdinalIgnoreCase))
+        {
+            throw new BusinessException("目标状态与当前状态相同");
+        }
+
+        var beforeSnap = await CaptureOrderAuditSnapshotAsync(order);
+        order.OrderStatus = target;
+        if (string.Equals(target, OrderStatusCodes.DeliverySuccess, StringComparison.OrdinalIgnoreCase))
+        {
+            order.SignTime = DateTime.Now;
+        }
+
+        order.UpdateTime = DateTime.Now;
+        await UpdateOrderAsync(order);
+
+        if (string.Equals(target, OrderStatusCodes.DeliverySuccess, StringComparison.OrdinalIgnoreCase))
+        {
+            order = await GetOrderOrThrowAsync(order.Id);
+            await ApplyDeliverySuccessMarketingAsync(order);
+        }
+
+        order = await GetOrderOrThrowAsync(order.Id);
+        var afterSnap = await CaptureOrderAuditSnapshotAsync(order);
+        var fromName = OmsDocHelper.GetOrderStatusName(fromStatus) ?? fromStatus;
+        var toName = OmsDocHelper.GetOrderStatusName(target) ?? target;
+        await OperationLogWriter.TryWriteAsync(
+            order,
+            OrderOperationActionCodes.ChangePostShipStatus,
+            beforeSnap,
+            afterSnap,
+            $"{fromName} → {toName}；{remark}");
+    }
+
+    private static readonly HashSet<string> PostShipChangeableStatuses = new(StringComparer.OrdinalIgnoreCase)
+    {
+        OrderStatusCodes.PendingOnline,
+        OrderStatusCodes.Shipping,
+        OrderStatusCodes.DeliverySuccess,
+        OrderStatusCodes.DeliveryFailed
+    };
+
+    private static bool IsPostShipChangeableStatus(string? status) =>
+        !string.IsNullOrWhiteSpace(status) && PostShipChangeableStatuses.Contains(status.Trim());
+
+    private static string? NormalizePostShipStatus(string? raw)
+    {
+        var value = raw?.Trim();
+        if (string.IsNullOrWhiteSpace(value) || !PostShipChangeableStatuses.Contains(value))
+        {
+            return null;
+        }
+
+        return PostShipChangeableStatuses.First(x =>
+            string.Equals(x, value, StringComparison.OrdinalIgnoreCase));
+    }
+
+    private async Task ApplyDeliverySuccessMarketingAsync(Order order)
+    {
         var commissionManager = LazyServiceProvider.GetRequiredService<ReferralCommissionManager>();
         await commissionManager.OnOrderDeliverySuccessAsync(order.Id);
 
diff --git a/src/Oms.Domain/OrdersAggregate/Consts/OrderOperationActionCodes.cs b/src/Oms.Domain/OrdersAggregate/Consts/OrderOperationActionCodes.cs
index b164f5d..71173e7 100644
--- a/src/Oms.Domain/OrdersAggregate/Consts/OrderOperationActionCodes.cs
+++ b/src/Oms.Domain/OrdersAggregate/Consts/OrderOperationActionCodes.cs
@@ -17,6 +17,7 @@ public static class OrderOperationActionCodes
     public const string Print = "print";
     public const string Inbound = "inbound";
     public const string Outbound = "outbound";
+    public const string ChangePostShipStatus = "changePostShipStatus";
 
     public static string GetActionName(string action) => action switch
     {
@@ -35,6 +36,7 @@ public static class OrderOperationActionCodes
         Print => "打印面单",
         Inbound => "入库",
         Outbound => "出库",
+        ChangePostShipStatus => "修改出库后状态",
         _ => action
     };
 }