diff --git a/src/picker/index.js b/src/picker/index.js
index 07d88de91..3ac2b7df1 100644
--- a/src/picker/index.js
+++ b/src/picker/index.js
@@ -176,7 +176,14 @@ export default createComponent({
     // set column option index by column index
     setColumnIndex(columnIndex, optionIndex) {
       const column = this.getColumn(columnIndex);
-      column && column.setIndex(optionIndex);
+
+      if (column) {
+        column.setIndex(optionIndex);
+
+        if (this.dataType === 'cascade') {
+          this.onCascadeChange(columnIndex);
+        }
+      }
     },
 
     // @exposed-api
diff --git a/src/picker/test/cascade.spec.js b/src/picker/test/cascade.spec.js
index 02bd3966d..5bc60a418 100644
--- a/src/picker/test/cascade.spec.js
+++ b/src/picker/test/cascade.spec.js
@@ -1,59 +1,84 @@
 import Picker from '..';
 import { mount, triggerDrag } from '../../../test';
-import { cascadeColumns } from '../demo/data';
+
+const COLUMNS = [
+  {
+    text: 'A1',
+    children: [
+      {
+        text: 'B1',
+        children: [{ text: 'C1' }, { text: 'C2' }],
+      },
+      {
+        text: 'B2',
+        children: [{ text: 'C3' }, { text: 'C4' }],
+      },
+    ],
+  },
+  {
+    text: 'A2',
+    children: [
+      {
+        text: 'B3',
+        children: [{ text: 'C5' }, { text: 'C6' }],
+      },
+      {
+        text: 'B4',
+        children: [{ text: 'C7' }, { text: 'C8' }],
+      },
+    ],
+  },
+];
 
 test('cascade columns', () => {
   const wrapper = mount(Picker, {
     propsData: {
       showToolbar: true,
-      columns: cascadeColumns['en-US'],
+      columns: COLUMNS,
     },
   });
 
   wrapper.find('.van-picker__confirm').trigger('click');
-  expect(wrapper.emitted('confirm')[0][0]).toEqual([
-    'Zhejiang',
-    'Hangzhou',
-    'Xihu',
-  ]);
+  expect(wrapper.emitted('confirm')[0][0]).toEqual(['A1', 'B1', 'C1']);
 
   triggerDrag(wrapper.find('.van-picker-column'), 0, -100);
   wrapper.find('.van-picker-column ul').trigger('transitionend');
-  expect(wrapper.emitted('change')[0][1]).toEqual([
-    'Fujian',
-    'Fuzhou',
-    'Gulou',
-  ]);
+  expect(wrapper.emitted('change')[0][1]).toEqual(['A2', 'B3', 'C5']);
 
   wrapper.find('.van-picker__confirm').trigger('click');
-  expect(wrapper.emitted('confirm')[1][0]).toEqual([
-    'Fujian',
-    'Fuzhou',
-    'Gulou',
-  ]);
+  expect(wrapper.emitted('confirm')[1][0]).toEqual(['A2', 'B3', 'C5']);
 });
 
 test('setColumnValue of cascade columns', () => {
   const wrapper = mount(Picker, {
     propsData: {
       showToolbar: true,
-      columns: cascadeColumns['en-US'],
+      columns: COLUMNS,
     },
   });
 
-  wrapper.vm.setColumnValue(0, 'Fujian');
+  wrapper.vm.setColumnValue(0, 'A2');
   wrapper.find('.van-picker__confirm').trigger('click');
-  expect(wrapper.emitted('confirm')[0][0]).toEqual([
-    'Fujian',
-    'Fuzhou',
-    'Gulou',
-  ]);
+  expect(wrapper.emitted('confirm')[0][0]).toEqual(['A2', 'B3', 'C5']);
 
-  wrapper.vm.setColumnValue(1, 'Xiamen');
+  wrapper.vm.setColumnValue(1, 'B4');
   wrapper.find('.van-picker__confirm').trigger('click');
-  expect(wrapper.emitted('confirm')[1][0]).toEqual([
-    'Fujian',
-    'Xiamen',
-    'Siming',
-  ]);
+  expect(wrapper.emitted('confirm')[1][0]).toEqual(['A2', 'B4', 'C7']);
+});
+
+test('setColumnIndex of cascade columns', () => {
+  const wrapper = mount(Picker, {
+    propsData: {
+      showToolbar: true,
+      columns: COLUMNS,
+    },
+  });
+
+  wrapper.vm.setColumnIndex(0, 1);
+  wrapper.find('.van-picker__confirm').trigger('click');
+  expect(wrapper.emitted('confirm')[0][0]).toEqual(['A2', 'B3', 'C5']);
+
+  wrapper.vm.setColumnIndex(1, 1);
+  wrapper.find('.van-picker__confirm').trigger('click');
+  expect(wrapper.emitted('confirm')[1][0]).toEqual(['A2', 'B4', 'C7']);
 });