diff --git a/Ems.CollectService.Entity/RecordWaterInstant.cs b/Ems.CollectService.Entity/RecordWaterInstant.cs
index 2a92a57..cdbd75f 100644
--- a/Ems.CollectService.Entity/RecordWaterInstant.cs
+++ b/Ems.CollectService.Entity/RecordWaterInstant.cs
@@ -13,7 +13,7 @@ namespace Ems.CollectService.Entity
         /// <summary>
         /// 自增标识 
         ///</summary>
-         [SugarColumn(ColumnName="objid" ,IsPrimaryKey = true   )]
+         [SugarColumn(ColumnName = "objid", IsPrimaryKey = true, IsIdentity = true)]
          public int objid { get; set; }
         /// <summary>
         /// 计量设备编号