diff --git a/docs/collocation/manifest.md b/docs/collocation/manifest.md
index 0dc0abbfefdf182f551d8734c2355c4632c01129..37d2eb4056c73eb5ac4886ccf7ab1a22616d245f 100644
--- a/docs/collocation/manifest.md
+++ b/docs/collocation/manifest.md
@@ -68,12 +68,16 @@ uni-app x 的隐私信息访问的许可描述配置，移入了[Info.plist](htt
 
 <!-- MANIFESTJSON.icons_android.table -->
 
+> 必须使用 `png` 格式图标
+
 ###### iOS图标配置 @icons-ios
 
 <!-- MANIFESTJSON.icons_ios.description -->
 
 <!-- MANIFESTJSON.icons_ios.table -->
 
+> 必须使用 `png` 格式图标，图片中不能存在透明区域  
+
 <!-- MANIFESTJSON.icons_ios.compatibility -->
 
 ##### App端启动界面配置 @distribute-splashScreens