diff --git a/main.go b/main.go
index 328e69f..3ce6cc2 100644
--- a/main.go
+++ b/main.go
@@ -94,7 +94,7 @@ func Start() {
 			}
 			return nil
 		}
-		if len(msgObj.Text.Content) == 1 || msgObj.Text.Content == "帮助" {
+		if len(msgObj.Text.Content) == 0 || msgObj.Text.Content == "帮助" {
 			// 欢迎信息
 			_, err := msgObj.ReplyToDingtalk(string(dingbot.MARKDOWN), public.Config.Help)
 			if err != nil {