diff --git a/packages/dialog/dialog.vue b/packages/dialog/dialog.vue
index 7114787cb..4980481af 100644
--- a/packages/dialog/dialog.vue
+++ b/packages/dialog/dialog.vue
@@ -1,7 +1,7 @@
 <template>
   <transition name="van-dialog-bounce">
     <div v-show="value" :class="[b(), className]">
-      <div v-if="title" v-text="title" :class="b('header')" />
+      <div v-if="title" v-text="title" :class="b('header', { isolated: !message && !$slots.default })" />
       <div :class="b('content')" v-if="message || $slots.default">
         <slot>
           <div v-if="message" v-html="message" :class="b('message', { 'has-title': title })" />
diff --git a/packages/vant-css/src/dialog.css b/packages/vant-css/src/dialog.css
index 955940f52..ad29b5437 100644
--- a/packages/vant-css/src/dialog.css
+++ b/packages/vant-css/src/dialog.css
@@ -15,6 +15,10 @@
   &__header {
     padding: 15px 0 0;
     text-align: center;
+
+    &--isolated {
+      padding: 25px 0;
+    }
   }
 
   &__message {
@@ -40,10 +44,6 @@
     }
   }
 
-  &__header + &__footer {
-    margin-top: 15px;
-  }
-
   .van-button {
     border: 0;
   }