diff --git a/DOAN.Service/MES/Product/ProWorkorderMaterialService.cs b/DOAN.Service/MES/Product/ProWorkorderMaterialService.cs
index 78f5b32..1050daa 100644
--- a/DOAN.Service/MES/Product/ProWorkorderMaterialService.cs
+++ b/DOAN.Service/MES/Product/ProWorkorderMaterialService.cs
@@ -166,6 +166,7 @@ namespace DOAN.Service.MES.product
                     throw new ArgumentException("工单号不存在", nameof(workorder));
                 }
                 var result = new PagedInfo<MaterialInventoryDto>();
+                result.Result = new List<MaterialInventoryDto>();
                 // 单原材料
                 if (workorderInfo.RouteCode != "10")
                 {