diff --git a/SGGL/BLL/Common/Funs.cs b/SGGL/BLL/Common/Funs.cs
index df9536a4..498e943f 100644
--- a/SGGL/BLL/Common/Funs.cs
+++ b/SGGL/BLL/Common/Funs.cs
@@ -5,6 +5,7 @@ namespace BLL
     using Quartz;
     using RestSharp;
     using System;
+    using System.Collections.Concurrent;
     using System.Collections.Generic;
     using System.Data;
     using System.Globalization;
@@ -22,13 +23,13 @@ namespace BLL
         /// <summary>
         /// 维护一个DB集合
         /// </summary>
-        private static Dictionary<int, Model.SGGLDB> dataBaseLinkList = new System.Collections.Generic.Dictionary<int, Model.SGGLDB>();
+        private static ConcurrentDictionary<int, Model.SGGLDB> dataBaseLinkList = new  ConcurrentDictionary<int, Model.SGGLDB>();
 
 
         /// <summary>
         /// 维护一个DB集合
         /// </summary>
-        public static System.Collections.Generic.Dictionary<int, Model.SGGLDB> DBList
+        public static ConcurrentDictionary<int, Model.SGGLDB> DBList
         {
             get
             {
@@ -148,7 +149,7 @@ namespace BLL
             {
                 if (!DBList.ContainsKey(System.Threading.Thread.CurrentThread.ManagedThreadId))
                 {
-                    DBList.Add(System.Threading.Thread.CurrentThread.ManagedThreadId, new SGGLDB(connString));
+                    DBList.TryAdd(System.Threading.Thread.CurrentThread.ManagedThreadId, new Model.SGGLDB(connString));
                 }
 
                 // DBList[System.Threading.Thread.CurrentThread.ManagedThreadId].CommandTimeout = 1200;
diff --git a/SGGL/WebAPI/Filter/TestPermissionAttribute.cs b/SGGL/WebAPI/Filter/TestPermissionAttribute.cs
index f0baa379..0d62f7a4 100644
--- a/SGGL/WebAPI/Filter/TestPermissionAttribute.cs
+++ b/SGGL/WebAPI/Filter/TestPermissionAttribute.cs
@@ -106,14 +106,15 @@ namespace WebAPI.Filter
             }
             if (!isOk)
             {
-                if (BLL.Funs.DBList.ContainsKey(System.Threading.Thread.CurrentThread.ManagedThreadId))
-                {
-                    BLL.Funs.DBList[System.Threading.Thread.CurrentThread.ManagedThreadId].Dispose();
-                    BLL.Funs.DBList.Remove(System.Threading.Thread.CurrentThread.ManagedThreadId);
-                }
-
+                
                 base.OnActionExecuted(actionExecutedContext);
             }
+            if (BLL.Funs.DBList.ContainsKey(System.Threading.Thread.CurrentThread.ManagedThreadId))
+            {
+                Model.SGGLDB db;
+                BLL.Funs.DBList.TryRemove(System.Threading.Thread.CurrentThread.ManagedThreadId,out db );
+                db.Dispose();
+            }
         }
 
         /// <summary>