diff --git a/src/WMS.Web.Domain/Services/InStockTaskService.cs b/src/WMS.Web.Domain/Services/InStockTaskService.cs
index 8c783e23..ce74d7fb 100644
--- a/src/WMS.Web.Domain/Services/InStockTaskService.cs
+++ b/src/WMS.Web.Domain/Services/InStockTaskService.cs
@@ -335,16 +335,16 @@ namespace WMS.Web.Domain.Services
                     var local_data_order = data_list.Where(t => t.SourceBillNo == item.BillNo).FirstOrDefault();
                     if (local_data_order != null)
                     {
-                        var local_data = data_list_details_new.Where(t => t.ErpDetailId == item.ErpDetailId).FirstOrDefault();
-                        if (local_data != null)
+                        var local_data = data_list_details_new.Where(t => t.ErpDetailId == item.ErpDetailId).ToList();
+                        if (local_data != null && local_data.Count!=0)
                         {
-
-                            if (local_data.MaterialId != item.MaterialId)
+                            var isHaveMater_detail= local_data.Where(t => t.MaterialId == item.MaterialId).Any();
+                            if (!isHaveMater_detail)
                             {
                                 //明细的物料改变了：新的物料重新添加一条明细
                                 var Add_task_no_materials = _mapper.Map<InStockTaskDetails>(item);
                                 data_list.Where(x => x.SourceBillNo == item.BillNo).FirstOrDefault().Status = InstockStatus.Part;
-                                data_list.Where(x => x.Id == local_data.Fid).FirstOrDefault()?.Details.Add(Add_task_no_materials);
+                                data_list.Where(x => x.SourceBillNo == item.BillNo).FirstOrDefault()?.Details.Add(Add_task_no_materials);
                             }
                         }
                         else