diff --git a/example/pages/datetime-picker/index.js b/example/pages/datetime-picker/index.js
index 38cf8acf..5578e8a2 100644
--- a/example/pages/datetime-picker/index.js
+++ b/example/pages/datetime-picker/index.js
@@ -1,4 +1,5 @@
 import Page from '../../common/page';
+import Toast from '../../dist/toast/toast';
 
 Page({
   data: {
@@ -6,14 +7,33 @@ Page({
     maxHour: 20,
     minDate: new Date(2018, 0, 1).getTime(),
     maxDate: new Date(2019, 10, 1).getTime(),
-    currentDate1: new Date(2018, 2, 1).getTime(),
+    currentDate1: new Date(2018, 2, 31).getTime(),
     currentDate2: null,
     currentDate3: new Date(2018, 0, 1),
     currentDate4: '12:00',
     loading: false
   },
 
-  onChange(event) {
-    console.log(event);
+  onInput(event) {
+    const { detail, currentTarget } = event;
+    const result = this.getResult(detail, currentTarget.dataset.type);
+
+    Toast(result);
+  },
+
+  getResult(time, type) {
+    const date = new Date(time);
+    switch (type) {
+      case 'datetime':
+        return date.toLocaleString();
+      case 'date':
+        return date.toLocaleDateString();
+      case 'year-month':
+        return `${date.getFullYear()}/${date.getMonth() + 1}`;
+      case 'time':
+        return time;
+      default:
+        return '';
+    }
   }
 });
diff --git a/example/pages/datetime-picker/index.wxml b/example/pages/datetime-picker/index.wxml
index e2ce89e9..ed06067f 100644
--- a/example/pages/datetime-picker/index.wxml
+++ b/example/pages/datetime-picker/index.wxml
@@ -1,37 +1,43 @@
 <demo-block title="选择完整时间">
   <van-datetime-picker
     type="datetime"
+    data-type="datetime"
     loading="{{ loading }}"
     value="{{ currentDate1 }}"
     min-date="{{ minDate }}"
-    bind:change="onChange"
+    bind:input="onInput"
   />
 </demo-block>
 
 <demo-block title="选择日期（年月日）">
   <van-datetime-picker
     type="date"
+    data-type="date"
     value="{{ currentDate2 }}"
     min-date="{{ minDate }}"
-    bind:change="onChange"
+    bind:input="onInput"
   />
 </demo-block>
 
 <demo-block title="选择日期（年月）">
   <van-datetime-picker
     type="year-month"
+    data-type="year-month"
     value="{{ currentDate3 }}"
     min-date="{{ minDate }}"
-    bind:change="onChange"
+    bind:input="onInput"
   />
 </demo-block>
 
 <demo-block title="选择时间">
   <van-datetime-picker
     type="time"
+    data-type="time"
     value="{{ currentDate4 }}"
     min-hour="{{ minHour }}"
     max-hour="{{ maxHour }}"
-    bind:change="onChange"
+    bind:input="onInput"
   />
 </demo-block>
+
+<van-toast id="van-toast" />
diff --git a/packages/datetime-picker/index.json b/packages/datetime-picker/index.json
index 01077f5d..a778e91c 100644
--- a/packages/datetime-picker/index.json
+++ b/packages/datetime-picker/index.json
@@ -1,6 +1,6 @@
 {
   "component": true,
   "usingComponents": {
-    "van-loading": "../loading/index"
+    "van-picker": "../picker/index"
   }
 }
diff --git a/packages/datetime-picker/index.ts b/packages/datetime-picker/index.ts
index 46123135..fd179d7b 100644
--- a/packages/datetime-picker/index.ts
+++ b/packages/datetime-picker/index.ts
@@ -4,8 +4,8 @@ import { isDef } from '../common/utils';
 const currentYear = new Date().getFullYear();
 
 function isValidDate(date) {
-  return isDef(date) && !isNaN(new Date(date).getTime())
-};
+  return isDef(date) && !isNaN(new Date(date).getTime());
+}
 
 function range(num, min, max) {
   return Math.min(Math.max(num, min), max);
@@ -93,24 +93,8 @@ VantComponent({
   },
 
   data: {
-    pickerValue: [],
-    innerValue: Date.now()
-  },
-
-  computed: {
-    columns() {
-      const results = this.getRanges().map(({ type, range }) => {
-        const values = times(range[1] - range[0] + 1, index => {
-          let value = range[0] + index;
-          value = type === 'year' ? `${value}` : padZero(value);
-          return value;
-        });
-
-        return values;
-      });
-
-      return results;
-    }
+    innerValue: Date.now(),
+    columns: []
   },
 
   watch: {
@@ -119,15 +103,51 @@ VantComponent({
       val = this.correctValue(val);
       const isEqual = val === data.innerValue;
       if (!isEqual) {
-        this.set({ innerValue: val }, () => {
-          this.updateColumnValue(val);
+        this.updateColumnValue(val).then(() => {
           this.$emit('input', val);
         });
       }
-    }
+    },
+    type: 'updateColumns',
+    minHour: 'updateColumns',
+    maxHour: 'updateColumns',
+    minMinute: 'updateColumns',
+    maxMinute: 'updateColumns'
   },
 
   methods: {
+    asyncSet(data) {
+      return new Promise(resolve => {
+        this.set(data, resolve);
+      });
+    },
+
+    getPicker() {
+      if (this.picker == null) {
+        const picker = (this.picker = this.selectComponent(
+          '.van-datetime-picker'
+        ));
+        const { setColumnValues } = picker;
+        picker.setColumnValues = (...args) =>
+          setColumnValues.apply(picker, [...args, false]);
+      }
+      return this.picker;
+    },
+
+    updateColumns() {
+      const results = this.getRanges().map(({ type, range }, index) => {
+        const values = times(range[1] - range[0] + 1, index => {
+          let value = range[0] + index;
+          value = type === 'year' ? `${value}` : padZero(value);
+          return value;
+        });
+
+        return { values };
+      });
+
+      return this.asyncSet({ columns: results });
+    },
+
     getRanges(): object[] {
       const { data } = this;
       if (data.type === 'time') {
@@ -143,8 +163,20 @@ VantComponent({
         ];
       }
 
-      const { maxYear, maxDate, maxMonth, maxHour, maxMinute } = this.getBoundary('max', data.innerValue);
-      const { minYear, minDate, minMonth, minHour, minMinute } = this.getBoundary('min', data.innerValue);
+      const {
+        maxYear,
+        maxDate,
+        maxMonth,
+        maxHour,
+        maxMinute
+      } = this.getBoundary('max', data.innerValue);
+      const {
+        minYear,
+        minDate,
+        minMonth,
+        minHour,
+        minMinute
+      } = this.getBoundary('min', data.innerValue);
 
       const result = [
         {
@@ -247,17 +279,17 @@ VantComponent({
       this.$emit('confirm', this.data.innerValue);
     },
 
-    onChange(event: Weapp.Event): void {
+    onChange(): void {
       const { data } = this;
-      const pickerValue = event.detail.value;
-      const values = pickerValue
-        .slice(0, data.columns.length)
-        .map((value, index) => data.columns[index][value]);
       let value;
 
+      const picker = this.getPicker();
+
       if (data.type === 'time') {
-        value = values.join(':');
+        const indexes = picker.getIndexes();
+        value = `${indexes[0] + data.minHour}:${indexes[1] + data.minMinute}`;
       } else {
+        const values = picker.getValues();
         const year = getTrueValue(values[0]);
         const month = getTrueValue(values[1]);
         const maxDate = getMonthEndDay(year, month);
@@ -276,82 +308,46 @@ VantComponent({
       }
       value = this.correctValue(value);
 
-      this.set({ innerValue: value }, () => {
-        this.updateColumnValue(value);
+      this.updateColumnValue(value).then(() => {
         this.$emit('input', value);
-        this.$emit('change', this);
+        this.$emit('change', picker);
       });
     },
 
-    getColumnValue(index) {
-      return this.getValues()[index];
-    },
-
-    setColumnValue(index, value) {
-      const { pickerValue, columns } = this.data;
-      pickerValue[index] = columns[index].indexOf(value);
-      this.set({ pickerValue });
-    },
-
-    getColumnValues(index) {
-      return this.data.columns[index];
-    },
-
-    setColumnValues(index, values) {
-      const { columns } = this.data;
-      columns[index] = values;
-      this.set({ columns });
-    },
-
-    getValues() {
-      const { pickerValue, columns } = this.data;
-      return pickerValue.map((value, index) => columns[index][value]);
-    },
-
-    setValues(values) {
-      const { columns } = this.data;
-      this.set({
-        pickerValue: values.map((value, index) => columns[index].indexOf(value))
-      });
-    },
-
-    updateColumnValue(value): void {
+    updateColumnValue(value) {
       let values = [];
       const { data } = this;
-      const { columns } = data;
+      const picker = this.getPicker();
 
       if (data.type === 'time') {
-        const currentValue = value.split(':');
-        values = [
-          columns[0].indexOf(currentValue[0]),
-          columns[1].indexOf(currentValue[1])
-        ];
+        const pair = value.split(':');
+        values = [pair[0], pair[1]];
       } else {
         const date = new Date(value);
-        values = [
-          columns[0].indexOf(`${date.getFullYear()}`),
-          columns[1].indexOf(padZero(date.getMonth() + 1))
-        ];
+        values = [`${date.getFullYear()}`, padZero(date.getMonth() + 1)];
         if (data.type === 'date') {
-          values.push(columns[2].indexOf(padZero(date.getDate())));
+          values.push(padZero(date.getDate()));
         }
         if (data.type === 'datetime') {
           values.push(
-            columns[2].indexOf(padZero(date.getDate())),
-            columns[3].indexOf(padZero(date.getHours())),
-            columns[4].indexOf(padZero(date.getMinutes()))
+            padZero(date.getDate()),
+            padZero(date.getHours()),
+            padZero(date.getMinutes())
           );
         }
       }
 
-      this.set({ pickerValue: values });
+      return this.asyncSet({ innerValue: value })
+        .then(() => this.updateColumns())
+        .then(() => {
+          picker.setValues(values);
+        });
     }
   },
 
   created() {
     const innerValue = this.correctValue(this.data.value);
-    this.set({ innerValue }, () => {
-      this.updateColumnValue(innerValue);
+    this.updateColumnValue(innerValue).then(() => {
       this.$emit('input', innerValue);
     });
   }
diff --git a/packages/datetime-picker/index.wxml b/packages/datetime-picker/index.wxml
index fef4bec7..13a1b478 100644
--- a/packages/datetime-picker/index.wxml
+++ b/packages/datetime-picker/index.wxml
@@ -1,34 +1,13 @@
-<view class="van-picker">
-  <view wx:if="{{ showToolbar }}" class="van-picker__toolbar van-hairline--bottom">
-    <view class="van-picker__cancel" bindtap="onCancel">{{ cancelButtonText }}</view>
-    <view class="van-picker__title">{{ title }}</view>
-    <view class="van-picker__confirm" bindtap="onConfirm">{{ confirmButtonText }}</view>
-  </view>
-
-  <view wx:if="{{ loading }}" class="van-picker__loading">
-    <van-loading color="#1989fa"/>
-  </view>
-
-  <picker-view
-    indicator-style="height: {{ itemHeight }}px;"
-    style="width: 100%; height: {{ itemHeight * visibleItemCount + 'px' }}"
-    bindchange="onChange"
-    value="{{ pickerValue }}"
-    class="van-picker__columns"
-  >
-    <picker-view-column
-      wx:for="{{ columns }}"
-      wx:for-item="row"
-      wx:for-index="rowIndex"
-      wx:key="rowIndex"
-      class="van-picker-column"
-    >
-      <view
-        wx:for="{{ row }}"
-        wx:key="{{ item }}"
-        style="line-height: {{ itemHeight }}px;"
-        class="van-picker-column__item {{ index === pickerValue[rowIndex] ? 'van-picker-column__item--selected' : '' }}"
-      >{{ item }}</view>
-    </picker-view-column>
-  </picker-view>
-</view>
+<van-picker
+  class="van-datetime-picker"
+  title="{{ title }}"
+  columns="{{ columns }}"
+  item-height="{{ itemHeight }}"
+  show-toolbar="{{ showToolbar }}"
+  visible-item-count="{{ visibleItemCount }}"
+  confirm-button-text="{{ confirmButtonText }}"
+  cancel-button-text="{{ cancelButtonText }}"
+  bind:change="onChange"
+  bind:confirm="onConfirm"
+  bind:cancel="onCancel"
+/>
diff --git a/packages/picker/index.ts b/packages/picker/index.ts
index 896f43a7..43631f78 100644
--- a/packages/picker/index.ts
+++ b/packages/picker/index.ts
@@ -1,5 +1,9 @@
 import { VantComponent } from '../common/component';
 
+function isSimple(columns) {
+  return columns.length && !columns[0].values;
+}
+
 VantComponent({
   classes: ['active-class', 'toolbar-class', 'column-class'],
 
@@ -25,15 +29,12 @@ VantComponent({
       type: Array,
       value: [],
       observer(columns = []) {
-        this.set({
-          simple: columns.length && !columns[0].values
-        }, () => {
-          const children = this.children = this.selectAllComponents('.van-picker__column');
+        this.simple = isSimple(columns);
+        const children = this.children = this.selectAllComponents('.van-picker__column');
 
-          if (Array.isArray(children) && children.length) {
-            this.setColumns();
-          }
-        });
+        if (Array.isArray(children) && children.length) {
+          this.setColumns();
+        }
       }
     }
   },
@@ -47,7 +48,7 @@ VantComponent({
 
     setColumns() {
       const { data } = this;
-      const columns = data.simple ? [{ values: data.columns }] : data.columns;
+      const columns = this.simple ? [{ values: data.columns }] : data.columns;
       columns.forEach((columns, index: number) => {
         this.setColumnValues(index, columns.values);
       });
@@ -55,7 +56,7 @@ VantComponent({
 
     emit(event: Weapp.Event) {
       const { type } = event.currentTarget.dataset;
-      if (this.data.simple) {
+      if (this.simple) {
         this.$emit(type, {
           value: this.getColumnValue(0),
           index: this.getColumnIndex(0)
@@ -69,7 +70,7 @@ VantComponent({
     },
 
     onChange(event: Weapp.Event) {
-      if (this.data.simple) {
+      if (this.simple) {
         this.$emit('change', {
           picker: this,
           value: this.getColumnValue(0),
@@ -118,7 +119,7 @@ VantComponent({
     },
 
     // set options of column by index
-    setColumnValues(index: number, options: any[]) {
+    setColumnValues(index: number, options: any[], needReset = true) {
       const column = this.children[index];
 
       if (
@@ -126,7 +127,9 @@ VantComponent({
         JSON.stringify(column.data.options) !== JSON.stringify(options)
       ) {
         column.set({ options }, () => {
-          column.setIndex(0);
+          if (needReset) {
+            column.setIndex(0);
+          }
         });
       }
     },
diff --git a/packages/picker/index.wxml b/packages/picker/index.wxml
index fa778f3c..bad2361f 100644
--- a/packages/picker/index.wxml
+++ b/packages/picker/index.wxml
@@ -21,12 +21,12 @@
   >
     <picker-column
       class="van-picker__column"
-      wx:for="{{ simple ? [columns] : columns }}"
-      wx:key="index"
+      wx:for="{{ isSimple(columns) ? [columns] : columns }}"
+      wx:key="{{ index }}"
       data-index="{{ index }}"
       custom-class="column-class"
       value-key="{{ valueKey }}"
-      initial-options="{{ simple ? item : item.values }}"
+      initial-options="{{ isSimple(columns) ? item : item.values }}"
       default-index="{{ item.defaultIndex }}"
       item-height="{{ itemHeight }}"
       visible-item-count="{{ visibleItemCount }}"
@@ -39,3 +39,10 @@
     />
   </view>
 </view>
+
+<wxs module="isSimple">
+  function isSimple(columns) {
+    return columns.length && !columns[0].values;
+  }
+  module.exports = isSimple;
+</wxs>