diff --git a/src/WMS.Web.Repositories/OutStockRepositories.cs b/src/WMS.Web.Repositories/OutStockRepositories.cs
index 18d0e857..bafd2ad8 100644
--- a/src/WMS.Web.Repositories/OutStockRepositories.cs
+++ b/src/WMS.Web.Repositories/OutStockRepositories.cs
@@ -339,13 +339,15 @@ namespace WMS.Web.Repositories
 
             foreach (var d in res.Details)
             {
+                var boxDetail = d.BoxsDetails.FirstOrDefault(f => f.BoxId == boxId);
+                if (boxDetail == null) continue;
                 BoxDetailResponse detail = new BoxDetailResponse();
                 detail.MaterialName = _erpBasicDataExtendService.GetMaterialName(materials, detail.MaterialId);
                 detail.MaterialNumber = _erpBasicDataExtendService.GetMaterialNumber(materials, detail.MaterialId);
                 detail.Specifications = _erpBasicDataExtendService.GetMaterialSpecifications(materials, detail.MaterialId);
                 detail.SerialNumbers = d.SerialNumbers;
                 detail.MaterialId = d.MaterialId;
-                detail.Qty = d.BoxsDetails.FirstOrDefault(f => f.BoxId == boxId)?.Qty ?? 0;
+                detail.Qty = boxDetail.Qty;
                 details.Add(detail);
             }
             return details;