diff --git a/packages/calendar/components/month/index.wxml b/packages/calendar/components/month/index.wxml
index 4a2c47c9e..0c73b2f79 100644
--- a/packages/calendar/components/month/index.wxml
+++ b/packages/calendar/components/month/index.wxml
@@ -19,7 +19,7 @@
       data-index="{{ index }}"
       bindtap="onClick"
     >
-      <view wx:if="{{ item.type === 'selected' }}" class="van-calendar__selected-day" style="background: {{ color }}">
+      <view wx:if="{{ item.type === 'selected' }}" class="van-calendar__selected-day" style="width: {{ rowHeight }}px; height: {{ rowHeight }}px; background: {{ color }}">
         <view wx:if="{{ item.topInfo }}" class="van-calendar__top-info">{{ item.topInfo }}</view>
         {{ item.text }}
         <view wx:if="{{ item.bottomInfo }}" class="van-calendar__bottom-info">
diff --git a/packages/calendar/test/__snapshots__/demo.spec.ts.snap b/packages/calendar/test/__snapshots__/demo.spec.ts.snap
index 887fb3efa..b2e135ccc 100644
--- a/packages/calendar/test/__snapshots__/demo.spec.ts.snap
+++ b/packages/calendar/test/__snapshots__/demo.spec.ts.snap
@@ -1531,7 +1531,7 @@ exports[`should render demo and match snapshot 1`] = `
                   >
                     <wx-view
                       class="van-calendar__selected-day"
-                      style="background: "
+                      style="width: 64px; height: 64px; background: "
                     >
                       
         20