diff --git a/pages/form/index.ts b/pages/form/index.ts
index 2a55dda..7827c0e 100644
--- a/pages/form/index.ts
+++ b/pages/form/index.ts
@@ -92,6 +92,9 @@ Page({
   },
   joinMeeting() {
     this.closeDialog()
+    if (this.data.isJoin) {
+      return
+    }
     this.setData({
       isJoin: true
     })