diff --git a/docs/css/box-shadow.md b/docs/css/box-shadow.md
index e3dfeeab98f605993ea91557be9b5e3f77f6b558..3e8884b37a71d9441128635079c0613203176d3d 100644
--- a/docs/css/box-shadow.md
+++ b/docs/css/box-shadow.md
@@ -13,4 +13,7 @@
 
 <!-- CSSJSON.box-shadow.compatibility -->
 
-<!-- CSSJSON.box-shadow.reference -->
\ No newline at end of file
+#### App平台差异
+iOS平台 box-shadow 和 overflow: hidden 不能同时设置，添加了阴影会导致 overflow：hidden 失效
+
+<!-- CSSJSON.box-shadow.reference -->