diff --git a/docs/component/radio.md b/docs/component/radio.md
index a38eab636c2cc0ec8ab9e183363ac404aba38e37..a7f6433c31eaeda2b2e3815a46f5303979262c15 100644
--- a/docs/component/radio.md
+++ b/docs/component/radio.md
@@ -56,11 +56,12 @@ export default {
             items: [{
                     value: 'USA',
                     name: '美国'
-                },
+                    checked: 'true'
+                },  
                 {
                     value: 'CHN',
                     name: '中国',
-                    checked: 'true'
+                  
                 },
                 {
                     value: 'BRA',