diff --git a/docs/component/radio-group.md b/docs/component/radio-group.md
index cd0fe071a511e9164860f041a962bfb0752d1311..0097e2172cc5a988d2ecf70407b426929cc66633 100644
--- a/docs/component/radio-group.md
+++ b/docs/component/radio-group.md
@@ -2,6 +2,8 @@
 
 <!-- UTSCOMJSON.radio-group.description -->
 
+同一个radio-group下的多个radio为单选效果，选中一个radio后其他radio将失去选中效果。
+
 <!-- UTSCOMJSON.radio-group.compatibility -->
 
 <!-- UTSCOMJSON.radio-group.attribute -->