diff --git a/document/common/config/menu.json b/document/common/config/menu.json
index 797f745c03de7fbf9fa495156eacd28449f5e727..9786adc0658ff899d180615c611244131fd907d3 100644
--- a/document/common/config/menu.json
+++ b/document/common/config/menu.json
@@ -29,6 +29,7 @@
             "popup": "Popup",
             "toast": "Toast",
             "picker": "Picker",
+            "cascade-picker": "CascadePicker",
             "time-picker": "TimePicker",
             "dialog": "Dialog",
             "action-sheet": "ActionSheet"
@@ -83,6 +84,7 @@
             "popup": "Popup",
             "toast": "Toast",
             "picker": "Picker",
+            "cascade-picker": "CascadePicker",
             "time-picker": "TimePicker",
             "dialog": "Dialog",
             "action-sheet": "ActionSheet"
diff --git a/document/components/docs/en-US/cascade-picker.md b/document/components/docs/en-US/cascade-picker.md
new file mode 100644
index 0000000000000000000000000000000000000000..50703d054f49fd257da1a7a04f708894aaa9b522
--- /dev/null
+++ b/document/components/docs/en-US/cascade-picker.md
@@ -0,0 +1,3 @@
+## CascadePicker
+
+Please waiting...
\ No newline at end of file
diff --git a/document/components/docs/zh-CN/cascade-picker.md b/document/components/docs/zh-CN/cascade-picker.md
new file mode 100644
index 0000000000000000000000000000000000000000..d28cbfc5d2e1a07677e95564e5f022fd1ed9e2da
--- /dev/null
+++ b/document/components/docs/zh-CN/cascade-picker.md
@@ -0,0 +1,207 @@
+## CascadePicker组件
+
+`CascadePicker`组件是级联选择器，用于实现多列选择之间的级联变化。比如，在选择省市区时，当省切换到了江苏省，城市列应该变成江苏省的各个城市，同理，如果城市切换到苏州市，区列的选项也应变成苏州市的各个区，这就级联的意义。
+
+### 示例
+
+- 基本用法
+
+  相比普通选择器，级联选择器需要传入的数据结构是不一样的。普通选择器的数据结构是一个二维数组，每一列对应一个固定的数组，而级联选择器，则需要传入的是一个树形结构，第一列的数组，的每个选项的children属性，对应着切换到该选项时后续列的数据，从而实现对后续列的改变。如下所示
+
+  ```html
+  <cube-button @click="showCascadePicker">Cascade Picker</cube-button>
+  ```
+  ```js
+  const cascadeData = [
+    {
+      value: 'Fruit',
+      text: 'Fruit',
+      children: [
+        {
+          value: 'Apple',
+          text: 'Apple',
+          children: [{ value: 1, text: 'One' }, { value: 2, text: 'Two' }]
+        },
+        {
+          value: 'Orange',
+          text: 'Orange',
+          children: [{ value: 3, text: 'Three'}, { value: 4, text: 'Four' }]
+        }
+      ]
+    },
+    {
+      value: 'Drink',
+      text: 'Drink',
+      children: [
+        {
+          value: 'Coffee',
+          text: 'Coffee',
+          children: [{ value: 1, text: 'One' }, { value: 2, text: 'Two' }]
+        },
+        {
+          value: 'Tea',
+          text: 'Tea',
+          children: [{ value: 1, text: 'One' }, { value: 3, text: 'Three'}]
+        }
+      ]
+    }
+  ]
+  export default {
+    mounted () {
+      this.cascadePicker = this.$createCascadePicker({
+        title: 'Cascade Picker',
+        data: cascadeData,
+        selectedIndex: [1, 0, 0],
+        onSelect: (selectedVal, selectedIndex, selectedText) => {
+          console.log('select', selectedVal, selectedIndex, selectedText)
+        },
+        onCancel: () => {
+          console.log('cancel')
+        }
+      })
+    },
+    methods: {
+      showCascadePicker() {
+        this.cascadePicker.show()
+      }
+    }
+  }
+  ```
+  当第一列选中`Fruit`时，第二列的选项是`Apple`、`Orange`。以此类推，当第二列选中`Orange`时，第三列的选项是`Three`、`Four`。
+
+- 省市区选择器
+
+  对于省市区选择器，只需要构造出级联选择器的数据结构传入就可以了。
+  
+  ```html
+  <cube-button @click="showCityPicker">City Picker</cube-button>
+  ```
+  ```js
+  import { provinceList, cityList, areaList } from 'example/data/area'
+  
+  const cityData = provinceList
+  cityData.forEach(province => {
+    province.children = cityList[province.value]
+    province.children.forEach(city => {
+      city.children = areaList[city.value]
+    })
+  })
+  
+  export default {
+    mounted () {
+      this.cityPicker = this.$createCascadePicker({
+        title: 'City Picker',
+        data: cityData,
+        onSelect: (selectedVal, selectedIndex, selectedText) => {
+          console.log('select', selectedVal, selectedIndex, selectedText)
+        },
+        onCancel: () => {
+          console.log('cancel')
+        }
+      })
+    },
+    methods: {
+      showCityPicker() {
+        this.cityPicker.show()
+      }
+    }
+  }
+  ```
+
+- 日期选择器
+
+  日期选择器的原理也是一样，就是构造出级联选择器的数据结构。而且我们还在示例中提供一个[日期选择器组件](https://github.com/didi/cube-ui/blob/dev/example/components/date-picker.vue)，可以传入起始日期和结束日期，帮你生成相应的级联树形数据结构。用法如下：
+
+  ```html
+  <cube-button @click="showDatePicker">Date Picker</cube-button>
+  ```
+  ```js
+  import DatePicker from 'example/components/date-picker.vue'
+
+  createAPI(Vue, DatePicker, ['select', 'cancel'], false)
+
+  export default {
+    mounted () {
+      this.datePicker = this.$createDatePicker({
+        min: [2008, 8, 8],
+        max: [2020, 10, 20],
+        onSelect: (selectedVal, selectedIndex, selectedText) => {
+          console.log('select', selectedVal, selectedIndex, selectedText)
+        },
+        onCancel: () => {
+          console.log('cancel')
+        }
+      })
+    },
+    methods: {
+      showDatePicker() {
+        this.datePicker.show()
+      }
+    }
+  }
+  ```
+
+- 实例方法 `setData`
+
+  `setData`方法，用于重置`CascadePicker`实例的数据和选中的索引。
+
+  ```html
+  <cube-button @click="showPicker">SetData Picker</cube-button>
+  ```
+  ```js
+  export default {
+    mounted () {
+      this.setDataPicker = this.$createCascadePicker({
+        title: 'Set Data',
+        onSelect: (selectedVal, selectedIndex, selectedText) => {
+          console.log('select', selectedVal, selectedIndex, selectedText)
+        },
+        onCancel: () => {
+          console.log('cancel')
+        }
+      })
+    },
+    methods: {
+      showSetDataPicker() {
+        // setData when picker is invisible
+        this.setDataPicker.setData(cascadeData)
+        this.setDataPicker.show()
+        setTimeout(() => {
+          // setData when picker is visible
+          this.setDataPicker.setData(cityData, [1, 1, 0])
+        }, 1000)
+      }
+    }
+  }
+  ```
+  
+  值得注意的一点是，虽然不管选择器显示前后，都可以`setData`，但是为了体验，在显示后`setData`，所传入的数据结构，必须与之前的列数相同，也就是说如果之前是三列选择器，显示时`setData`还得是三列。
+  
+### Props 配置
+
+| 参数 | 说明 | 类型 | 默认值 | 示例 |
+| - | - | - | - | - |
+| title | 标题 | String | '' | - |
+| data | 级联选择器的树形数据，用于初始化选项 | Array | [] | - |
+| selectIndex | 被选中的索引值，拉起选择器后显示这个索引值对应的内容 | Array | [] | [1] |
+
+* `data`子配置项
+
+| 参数 | 说明 | 类型 | 默认值 | 示例 |
+| - | - | - | - | - |
+| text | 每个选项展示的文案 | String/Number | - | - |
+| value | 每个选项的值 | String/Number/Boolean | - | - |
+
+### 事件
+
+| 事件名 | 说明 | 参数1 | 参数2 | 参数3 |
+| - | - | - | - | - |
+| select | 点击确认按钮触发此事件 | selectedVal: 当前选中项每一列的值，Array类型 | selectedIndex: 当前选中项每一列的索引，Array类型 | selectedText: 当前选中项每一列的文案，Array类型 |
+| change | 滚轴滚动后触发此事件 | index: 当前滚动列次序，Number类型 | selectedIndex: 当前列选中项的索引，Number类型 |
+| cancel | 点击取消按钮触发此事件 | - | - |
+
+### 实例方法
+
+| 方法名 | 说明 | 参数1 | 参数2 |
+| - | - | - | - |
+| setData | 重置数据和选中的索引 | 级联树形数据结构，Array类型 | 每列选中的索引，Array类型 |
diff --git a/example/data/cascade.js b/example/data/cascade.js
index b40350b5ca5e92f59ee74ae4c78c886693a3e7e9..45867004e83984f5daa3fa890081a4aaba980a99 100644
--- a/example/data/cascade.js
+++ b/example/data/cascade.js
@@ -25,14 +25,6 @@ export const cascadeData = [
         value: 'Orange',
         text: 'Orange',
         children: [
-          {
-            value: 1,
-            text: 'One'
-          },
-          {
-            value: 2,
-            text: 'Two'
-          },
           {
             value: 3,
             text: 'Three'
diff --git a/example/pages/cascade-picker.vue b/example/pages/cascade-picker.vue
index 00eaaca59e47696870a7328fc43557ee78aeb81c..ce81b6795428382946fff108ab5d93a40076c40d 100644
--- a/example/pages/cascade-picker.vue
+++ b/example/pages/cascade-picker.vue
@@ -35,7 +35,7 @@
       this.cascadePicker = this.$createCascadePicker({
         title: 'Cascade Picker',
         data: cascadeData,
-        selectedIndex: [1, 0, 0],
+        selectedIndex: [0, 1, 0],
         onSelect: this.selectHandle,
         onCancel: this.cancelHandle,
         onChange: () => {