diff --git a/src/WMS.Web.Domain/Services/Public/ErpService.cs b/src/WMS.Web.Domain/Services/Public/ErpService.cs
index c64ee64c..80c4301a 100644
--- a/src/WMS.Web.Domain/Services/Public/ErpService.cs
+++ b/src/WMS.Web.Domain/Services/Public/ErpService.cs
@@ -1085,6 +1085,7 @@ namespace WMS.Web.Domain.Services.Public
         /// <returns></returns>
         private async Task<ErpMaterialDto> BillQueryForMaterialByNumber(string number)
         {
+            if (string.IsNullOrEmpty(number)) return null;
             //2.先登录金蝶-拿到token
             var token_result = await this.Init();
             if (!token_result.IsSuccess)