diff --git a/src/WMS.Web.Repositories/SerialNumbersRepositories.cs b/src/WMS.Web.Repositories/SerialNumbersRepositories.cs
index 39263271..6fe0c34f 100644
--- a/src/WMS.Web.Repositories/SerialNumbersRepositories.cs
+++ b/src/WMS.Web.Repositories/SerialNumbersRepositories.cs
@@ -138,12 +138,13 @@ namespace WMS.Web.Repositories
                 return response;
             }
             var entity = await _context.SerialNumbers.FirstOrDefaultAsync(w => serialNumber.Equals(w.SerialNumber));
+            if (entity == null) return new MaterialResponse();
             response.SerialNumber = entity.SerialNumber;
             response.MaterialId = entity.MaterialId;
             response.MaterialName = _erpBasicDataExtendService.GetMaterialName(materials, entity.MaterialId);
             response.MaterialNumber = _erpBasicDataExtendService.GetMaterialNumber(materials, entity.MaterialId);
             response.Specifications = _erpBasicDataExtendService.GetMaterialSpecifications(materials, entity.MaterialId);
-            return new MaterialResponse();
+            return response;
         }
     }
 }