diff --git a/api/include/mk_player.h b/api/include/mk_player.h
index 14092cd7..13ac2bbc 100755
--- a/api/include/mk_player.h
+++ b/api/include/mk_player.h
@@ -114,6 +114,7 @@ API_EXPORT void API_CALL mk_player_set_on_shutdown(mk_player ctx, on_mk_play_eve
 
 /**
  * 设置音视频数据回调函数
+ * 该接口只能在播放成功事件触发后才能调用
  * @param ctx 播放器指针
  * @param cb 回调函数指针,不得为null
  * @param user_data 用户数据指针