diff --git a/README.md b/README.md
index b4d79b1..34988d3 100644
--- a/README.md
+++ b/README.md
@@ -38,4 +38,5 @@ create_xml('sitemap.xml', get_url.url_res_final)
 ./sitemap.py
 ```
 
-
+## 存在问题
+- 爬取栈深度设置的较大之后爬取会比较慢