diff --git a/src/WMS.Web.Domain/Services/InStockTaskService.cs b/src/WMS.Web.Domain/Services/InStockTaskService.cs
index 53a88374..f43926cd 100644
--- a/src/WMS.Web.Domain/Services/InStockTaskService.cs
+++ b/src/WMS.Web.Domain/Services/InStockTaskService.cs
@@ -301,7 +301,7 @@ namespace WMS.Web.Domain.Services
                         item.Remark = erp_data.Remark;
                         item.AccruedQty = erp_data.Qty;
                         item.FactoryPrice = erp_data.FactoryPrice;
-                        item.DeliveredQty = erp_data.DeliveredQty> item.DeliveredQty? erp_data.DeliveredQty: item.DeliveredQty;                        
+                        item.DeliveredQty = item.DeliveredQty+erp_data.DeliveredQty;                        
                         //打印日志：需要的修改条数
                         totalUpdateCount++;
                         erp_remove_billNo.Add(data.SourceBillNo);