diff --git a/src/WMS.Web.Domain/Services/OutStockTaskService.cs b/src/WMS.Web.Domain/Services/OutStockTaskService.cs
index 3222202c..aff32b85 100644
--- a/src/WMS.Web.Domain/Services/OutStockTaskService.cs
+++ b/src/WMS.Web.Domain/Services/OutStockTaskService.cs
@@ -680,7 +680,7 @@ namespace WMS.Web.Domain.Services
                 else
                 {
                     //和上一个箱子比 如果是相同的箱子序号一样
-                    if (response.Details[i].BoxBillNo == response.Details[i - 1].BoxBillNo)
+                    if (response.Details[i].Specifications == response.Details[i - 1].Specifications)
                         response.Details[i].IndexNumber = response.Details[i - 1].IndexNumber;
                     else
                         response.Details[i].IndexNumber = response.Details[i - 1].IndexNumber + 1;