diff --git a/src/page/Meeting/index.tsx b/src/page/Meeting/index.tsx
index c3a52ff..082b928 100644
--- a/src/page/Meeting/index.tsx
+++ b/src/page/Meeting/index.tsx
@@ -166,7 +166,6 @@ const Meeting: React.FC = () => {
           getRoomUser()
           break;
       }
-
     })
   }, [])
 
diff --git a/src/utils/package/signalr.ts b/src/utils/package/signalr.ts
index f9d3591..2c5aed6 100644
--- a/src/utils/package/signalr.ts
+++ b/src/utils/package/signalr.ts
@@ -17,18 +17,19 @@ export const startSignalr = () => {
 }
 
 export const onSignalr = (callBack: Function) => {
-  connection.on("ReceiveMessage", (uid: string, userName: string, message: string) => {
-    callBack({
-      key:'ReceiveMessage',
-      uid, message, userName
-    })
-  });
-  connection.on("RefreshUserList", () => {
-    callBack({
-      key: 'ReceiveMessage'
-    })
-  });
-
+  if (connection){
+    connection.on("ReceiveMessage", (uid: string, userName: string, message: string) => {
+      callBack({
+        key:'ReceiveMessage',
+        uid, message, userName
+      })
+    });
+    connection.on("RefreshUserList", () => {
+      callBack({
+        key: 'ReceiveMessage'
+      })
+    });
+  }
 }
 export const onInvoke = async (str: string, data: any) => {
   switch (str) {