diff --git a/docs/css/margin-left.md b/docs/css/margin-left.md
index cfe70aed0a7b0f764f1a1be6962946a102ee3e9a..80d2bada2f69ca3a8d13691f4695ec3a6d480821 100644
--- a/docs/css/margin-left.md
+++ b/docs/css/margin-left.md
@@ -12,7 +12,8 @@
 <!-- CSSJSON.margin-left.unixTags -->
 
 **注意**  
-- app端不支持外边距折叠  
+
+- app平台不支持外边距重叠  
 - HBuilderX3.98以下版本当 position 设置为 fixed 或 absolute 时， margin不支持 auto  
 
 <!-- CSSJSON.margin-left.compatibility -->