diff --git a/src/dropdown-menu/README.md b/src/dropdown-menu/README.md
index 776739383..a876af39c 100644
--- a/src/dropdown-menu/README.md
+++ b/src/dropdown-menu/README.md
@@ -183,6 +183,13 @@ duration | String / Number | 200 | 动画时长 | N
 show-overlay | Boolean | true | 是否显示遮罩层 | N
 z-index | Number | 11600 | 菜单栏 z-index 层级 | N
 
+### DropdownMenu Function
+
+方法名 | 说明 | 参数 | 返回值
+--|--|--|--
+toggle | 切换下拉菜单的展示状态，传入索引值则切换对应菜单，不传值则关闭当前菜单 | index?: number | `void`
+
+> 通过 `this.selectComponent` 获取组件示例，调用即可
 ### DropdownItem Props
 
 名称 | 类型 | 默认值 | 说明 | 必传
@@ -202,4 +209,4 @@ default-value | String / Number / Array | undefined | 选中值。非受控属
 名称 | 参数 | 描述
 -- | -- | --
 change | `(value: TdDropdownItemOptionValueType | Array<TdDropdownItemOptionValueType>)` | 值改变时触发
-confirm | `(value: TdDropdownItemOptionValueType | Array<TdDropdownItemOptionValueType>)` | 点击确认时触发
+confirm | `(value: TdDropdownItemOptionValueType | Array<TdDropdownItemOptionValueType>)` | 点击确认时触发
\ No newline at end of file
diff --git a/src/dropdown-menu/dropdown-menu.ts b/src/dropdown-menu/dropdown-menu.ts
index a8bcb7959..a603ab787 100644
--- a/src/dropdown-menu/dropdown-menu.ts
+++ b/src/dropdown-menu/dropdown-menu.ts
@@ -34,22 +34,12 @@ export default class DropdownMenu extends SuperComponent {
   };
 
   methods = {
-    getAllItems() {
-      const nodes = this.getRelationNodes('./dropdown-item');
-      const menus = nodes.map((a) => a.data);
-
-      this.setData({
-        nodes,
-        menus,
-      });
-    },
-    toggleDropdown(e: WechatMiniprogram.BaseEvent) {
-      const { index: idx } = e.currentTarget.dataset;
+    toggle(index: number) {
       const { activeIdx, duration } = this.data;
       const prevItem = this.data.nodes[activeIdx];
-      const currItem = this.data.nodes[idx];
+      const currItem = this.data.nodes[index];
 
-      if (currItem.data.disabled) return;
+      if (currItem?.data.disabled) return;
 
       if (activeIdx !== -1) {
         prevItem.triggerEvent('close');
@@ -65,14 +55,14 @@ export default class DropdownMenu extends SuperComponent {
         );
       }
 
-      if (activeIdx === idx) {
+      if (index == null || activeIdx === index) {
         this.setData({
           activeIdx: -1,
         });
       } else {
         currItem.triggerEvent('open');
         this.setData({
-          activeIdx: idx,
+          activeIdx: index,
         });
         currItem.setData(
           {
@@ -86,5 +76,19 @@ export default class DropdownMenu extends SuperComponent {
         );
       }
     },
+    getAllItems() {
+      const nodes = this.getRelationNodes('./dropdown-item');
+      const menus = nodes.map((a) => a.data);
+
+      this.setData({
+        nodes,
+        menus,
+      });
+    },
+    handleToggle(e: WechatMiniprogram.BaseEvent) {
+      const { index } = e.currentTarget.dataset;
+
+      this.toggle(index);
+    },
   };
 }
diff --git a/src/dropdown-menu/dropdown-menu.wxml b/src/dropdown-menu/dropdown-menu.wxml
index 6530bac2d..b5aa75f46 100644
--- a/src/dropdown-menu/dropdown-menu.wxml
+++ b/src/dropdown-menu/dropdown-menu.wxml
@@ -3,7 +3,7 @@
     <view
       wx:for="{{menus}}"
       wx:key="index"
-      bindtap="toggleDropdown"
+      bindtap="handleToggle"
       data-index="{{index}}"
       class="{{ classPrefix }}__item {{ activeIdx == index ? prefix + '-is-active' : ''}} {{ item.disabled ? prefix + '-is-disabled' : ''}}"
     >