diff --git a/Api/Ewide.Core/Util/TreeBuildUtil.cs b/Api/Ewide.Core/Util/TreeBuildUtil.cs
index aefd91c..d68ab46 100644
--- a/Api/Ewide.Core/Util/TreeBuildUtil.cs
+++ b/Api/Ewide.Core/Util/TreeBuildUtil.cs
@@ -1,4 +1,5 @@
-using System.Collections;
+using System;
+using System.Collections;
 using System.Collections.Generic;
 
 namespace Ewide.Core
@@ -36,7 +37,7 @@ namespace Ewide.Core
         /// <summary>
         /// 顶级节点的父节点Id(默认0)
         /// </summary>
-        private readonly string _rootParentId = System.Guid.Empty.ToString().ToLower();
+        private readonly List<string> _rootParentIds = new List<string> {string.Empty,Guid.Empty.ToString() };
 
         /// <summary>
         /// 构造树节点
@@ -50,7 +51,7 @@ namespace Ewide.Core
             var results = new List<T>();
             nodes.ForEach(u =>
             {
-                if (_rootParentId == u.GetPid())
+                if (_rootParentIds.Contains(u.GetPid()))
                     results.Add(u);
             });
             return results;