diff --git a/src/dialog/Dialog.js b/src/dialog/Dialog.js
index 4b132f926..18058a819 100644
--- a/src/dialog/Dialog.js
+++ b/src/dialog/Dialog.js
@@ -225,7 +225,9 @@ export default createComponent({
         >
           {Title}
           {this.genContent(title, messageSlot)}
-          {this.theme === 'round' ? this.genRoundButtons() : this.genButtons()}
+          {this.theme === 'round-button'
+            ? this.genRoundButtons()
+            : this.genButtons()}
         </div>
       </transition>
     );
diff --git a/src/dialog/README.md b/src/dialog/README.md
index 82faf94ae..c7fed18ab 100644
--- a/src/dialog/README.md
+++ b/src/dialog/README.md
@@ -30,22 +30,22 @@ Dialog.alert({
 });
 ```
 
-### Round Style
+### Round Button Style
 
-use round style.
+Use round button style.
 
 ```js
 Dialog.alert({
   title: 'Title',
   message: 'Content',
-  theme: 'round',
+  theme: 'round-button',
 }).then(() => {
   // on close
 });
 
 Dialog.alert({
   message: 'Content',
-  theme: 'round',
+  theme: 'round-button',
 }).then(() => {
   // on close
 });
diff --git a/src/dialog/README.zh-CN.md b/src/dialog/README.zh-CN.md
index 1ac85430f..67818beda 100644
--- a/src/dialog/README.zh-CN.md
+++ b/src/dialog/README.zh-CN.md
@@ -56,22 +56,22 @@ Dialog.alert({
 });
 ```
 
-### 圆角风格
+### 圆角按钮风格
 
-样式为圆角风格。
+将 theme 选项设置为 `round-button` 可以展示圆角按钮风格的弹窗，该选项从 2.10.0 版本开始支持。
 
 ```js
 Dialog.alert({
   title: '标题',
   message: '弹窗内容',
-  theme: 'round',
+  theme: 'round-button',
 }).then(() => {
   // on close
 });
 
 Dialog.alert({
   message: '弹窗内容',
-  theme: 'round',
+  theme: 'round-button',
 }).then(() => {
   // on close
 });
diff --git a/src/dialog/demo/index.vue b/src/dialog/demo/index.vue
index 41e3dd17b..50c2198c7 100644
--- a/src/dialog/demo/index.vue
+++ b/src/dialog/demo/index.vue
@@ -9,7 +9,7 @@
       </van-button>
     </demo-block>
 
-    <demo-block :title="t('round')">
+    <demo-block :title="t('roundButton')">
       <van-button type="primary" @click="onClickRound">
         {{ t('alert1') }}
       </van-button>
@@ -52,7 +52,7 @@ export default {
     'zh-CN': {
       alert1: '提示弹窗',
       alert2: '提示弹窗（无标题）',
-      round: '圆角样式',
+      round: '圆角按钮样式',
       confirm: '确认弹窗',
       asyncClose: '异步关闭',
       componentCall: '组件调用',
@@ -61,6 +61,7 @@ export default {
     'en-US': {
       alert1: 'Alert',
       alert2: 'Alert without title',
+      round: 'Round Button Style',
       confirm: 'Confirm dialog',
       asyncClose: 'Async Close',
       componentCall: 'Component Call',
@@ -91,7 +92,7 @@ export default {
 
     onClickRound() {
       this.$dialog.alert({
-        theme: 'round',
+        theme: 'round-button',
         title: this.t('title'),
         message: this.t('content'),
       });
@@ -99,7 +100,7 @@ export default {
 
     onClickRound2() {
       this.$dialog.alert({
-        theme: 'round',
+        theme: 'round-button',
         message: this.t('content'),
       });
     },