diff --git a/websocket/connectionManager.js b/websocket/connectionManager.js
index a11eb37..360a53a 100644
--- a/websocket/connectionManager.js
+++ b/websocket/connectionManager.js
@@ -1,28 +1,46 @@
-const connections = new Map();
+const onlineUsers = new Map();
 
 // 保存用户连接
 function addConnection(username, ws) {
-  connections.set(username, ws);
+  onlineUsers.set(username, ws);
 
   console.log(`用户 ${username} 已连接`);
-  console.log("当前在线用户：", [...connections.keys()]);
+  console.log("当前在线用户：", [...onlineUsers.keys()]);
 }
 
 // 获取用户连接
 function getConnection(username) {
-  return connections.get(username);
+  return onlineUsers.get(username);
 }
 
 // 删除用户连接
 function removeConnection(username) {
-  connections.delete(username);
+  onlineUsers.delete(username);
 
   console.log(`用户 ${username} 已断开`);
-  console.log("当前在线用户：", [...connections.keys()]);
+  console.log("当前在线用户：", [...onlineUsers.keys()]);
+}
+
+// 获取所有在线用户
+function getOnlineUsers() {
+  return Array.from(onlineUsers.keys());
+}
+
+// 广播所有在线用户
+function broadcast(data) {
+  const message = JSON.stringify(data);
+
+  for (const ws of onlineUsers.values()) {
+    if (ws.readyState === WebSocket.OPEN) {
+      ws.send(message);
+    }
+  }
 }
 
 module.exports = {
   addConnection,
   getConnection,
   removeConnection,
+  getOnlineUsers,
+  broadcast
 };
\ No newline at end of file
diff --git a/websocket/index.js b/websocket/index.js
index caccacf..0a9e4ab 100644
--- a/websocket/index.js
+++ b/websocket/index.js
@@ -8,6 +8,8 @@ const {
   addConnection,
   getConnection,
   removeConnection,
+  getOnlineUsers,
+  broadcast
 } = require("./connectionManager");
 
 // 创建WebSocket服务
@@ -44,21 +46,33 @@ function initWebSocket(server) {
     // 保存连接
     addConnection(username, ws);
 
+    // 通知所有在线用户当前在线用户列表
+    broadcast({
+      type: "userOnline",
+      userList: getOnlineUsers()
+    });
+
     // 接收客户端消息
     ws.on("message", (message) => {
-      try {
-        const data = JSON.parse(message.toString());
-        console.log("收到WebSocket消息：", data);
+        try {
+          const data = JSON.parse(message.toString());
+          console.log("收到WebSocket消息：", data);
 
-        handleMessage(username, data);
-      } catch (error) {
-        console.error("WebSocket消息处理失败：", error);
-      }
-    });
+          handleMessage(username, data);
+        } catch (error) {
+          console.error("WebSocket消息处理失败：", error);
+        }
+      });
 
     // 连接关闭
     ws.on("close", () => {
       removeConnection(username);
+      
+      // 通知所有在线用户当前在线用户列表
+      broadcast({
+        type: "userOnline",
+        userList: getOnlineUsers()
+      });
     });
 
     // WebSocket错误
@@ -121,7 +135,6 @@ function handleSendMessage(senderName, data) {
             message: "消息保存失败"
           })
         );
-
       }
       return;
     }