diff --git a/zh-cn/application-dev/reference/apis/js-apis-eventhub.md b/zh-cn/application-dev/reference/apis/js-apis-eventhub.md
index cdce9e3617ce117b221abcd8b86d6bb3564cdc8a..6dc68700bdc40284a457dccaafa5496d1ee1b097 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-eventhub.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-eventhub.md
@@ -133,7 +133,7 @@ emit(event: string, ...args: Object[]): void;
           // func1 is called,1,2
           this.context.eventHub.emit("123", 1, 2);
       }
-      func1(a: string, b: string) {
+      func1(a, b) {
           console.log("func1 is called," + a + "," + b);
       }
   }