diff --git a/Util.js b/Util.js
index b0374c9ba9aa696fa234b4a1ee447887f227373b..fcd76240db080a276a76c5b360a8f7c4a138f22a 100644
--- a/Util.js
+++ b/Util.js
@@ -22,6 +22,7 @@ class AuthMsg {
     static SESSION_ID_BYTE = 1; //sessionId占字节
     static SESSION_TBYTE = 4; //session占字节
     static SW_PORT = 19099; //websockets端口
+    static SESSION_LIMIT = 256; //最大并发数（最多可同时申请256个session）
 }
 
 class Utils {
diff --git a/session.js b/session.js
index 752387e33ee40ba35c8b66cfb12ea2670a9aabcc..2d5cec948a26d768e73e82f6887a3b0afc718109 100644
--- a/session.js
+++ b/session.js
@@ -15,23 +15,15 @@
 const Utils = require('./Util.js');
 const TypeManage = require('./typeManage.js');
 class SessionJs {
-    static sessionMap = new Map([
-        [1, null],
-        [2, null],
-        [3, null],
-        [4, null],
-        [5, null],
-        [6, null],
-        [7, null],
-        [8, null]
-    ]);
+    static sessionMap = getSessionMap();
     static applySession = function (ws, decoderMessage) {
         // 防止连续申请session
-        if(ws.userData && ws.userData.sessionId){
+        if (ws.userData && ws.userData.sessionId) {
             return;
         };
         let sendSessionMsg = {};
         if (decoderMessage.cmd === Utils.AuthMsg.LOGIN_CMD) {
+            ws.userData = {};
             for (let key of SessionJs.sessionMap.keys()) {
                 if (SessionJs.sessionMap.get(key) === null) {
                     // 将sessionId保存在对应ws的userData对象中，在关闭会话的时候要用
@@ -58,6 +50,14 @@ class SessionJs {
     };
 };
 
+function getSessionMap(){
+    const getSessionMap = new Map();
+        for (let index = 1; index <= Utils.AuthMsg.SESSION_LIMIT; index++) {
+            getSessionMap.set(index,null);
+        }
+        return getSessionMap;
+}
+
 
 module.exports = {
     SessionJs