diff --git a/FrontendWebApi/Models/GraphManage.cs b/FrontendWebApi/Models/GraphManage.cs
index ffeb4e6..7a3f2c2 100644
--- a/FrontendWebApi/Models/GraphManage.cs
+++ b/FrontendWebApi/Models/GraphManage.cs
@@ -43,4 +43,12 @@ namespace FrontendWebApi.Models
         public List<int> sub_system_tag { get; set; }
         public string keyWord { get; set; }
     }
+
+    public class GraphVar
+    {
+        public int id { get; set; }
+        public string system_key { get; set; }
+        public string system_type { get; set; }
+        public int system_parent_id { get; set; }
+    }
 }