diff --git a/packages/tree-select/index.js b/packages/tree-select/index.js
deleted file mode 100644
index bd6b981bd..000000000
--- a/packages/tree-select/index.js
+++ /dev/null
@@ -1,100 +0,0 @@
-import { use } from '../utils';
-import Icon from '../icon';
-
-const [sfc, bem] = use('tree-select');
-
-export default sfc({
-  props: {
-    items: Array,
-    mainActiveIndex: Number,
-    activeId: {
-      type: [Number, String],
-      default: 0
-    },
-    height: {
-      type: Number,
-      default: 300
-    }
-  },
-
-  computed: {
-    subItems() {
-      const selectedItem = this.items[this.mainActiveIndex] || {};
-      return selectedItem.children || [];
-    }
-  },
-
-  methods: {
-    onClickNav(data, index) {
-      if (!data.disabled) {
-        this.$emit('navclick', index);
-      }
-    },
-
-    onItemSelect(data) {
-      if (!data.disabled) {
-        this.$emit('itemclick', data);
-      }
-    }
-  },
-
-  render(h) {
-    const {
-      height,
-      items,
-      mainActiveIndex,
-      activeId,
-      subItems
-    } = this;
-
-    return (
-      <div class={bem()} style={{ height: height + 'px' }}>
-        <div class={bem('nav')}>
-          {items.map((item, index) => (
-            <div
-              key={index}
-              class={[
-                'van-ellipsis',
-                bem('nitem', {
-                  active: mainActiveIndex === index,
-                  disabled: item.disabled
-                })
-              ]}
-              onClick={() => {
-                this.onClickNav(item, index);
-              }}
-            >
-              { item.text }
-            </div>
-          ))}
-        </div>
-        <div class={bem('content')}>
-          {subItems.map(item => (
-            <div
-              key={item.id}
-              class={[
-                'van-ellipsis',
-                bem('item', {
-                  active: activeId === item.id,
-                  disabled: item.disabled
-                })
-              ]}
-              onClick={() => {
-                this.onItemSelect(item);
-              }}
-            >
-              { item.text }
-              {activeId === item.id && (
-                <Icon
-                  name="checked"
-                  size="16px"
-                  class={bem('selected')}
-                />
-              )}
-            </div>
-          ))}
-        </div>
-      </div>
-    );
-  }
-});
diff --git a/packages/tree-select/index.tsx b/packages/tree-select/index.tsx
new file mode 100644
index 000000000..f31cda85c
--- /dev/null
+++ b/packages/tree-select/index.tsx
@@ -0,0 +1,105 @@
+import { use } from '../utils';
+import { emit, inherit } from '../utils/functional';
+import Icon from '../icon';
+
+// Types
+import { CreateElement, RenderContext } from 'vue/types';
+import { DefaultSlots } from '../utils/use/sfc';
+
+export type TreeSelectItem = {
+  text: string;
+  disabled?: boolean;
+  children: TreeSelectChildren[];
+};
+
+export type TreeSelectChildren = {
+  id: number;
+  text: string;
+  disabled?: boolean;
+};
+
+export type TreeSelectProps = {
+  height: number;
+  items: TreeSelectItem[];
+  activeId: number | string;
+  mainActiveIndex: number;
+};
+
+const [sfc, bem] = use('tree-select');
+
+function TreeSelect(
+  h: CreateElement,
+  props: TreeSelectProps,
+  slots: DefaultSlots,
+  ctx: RenderContext<TreeSelectProps>
+) {
+  const { height, items, mainActiveIndex, activeId } = props;
+
+  const selectedItem = items[mainActiveIndex] || {};
+  const subItems = selectedItem.children || [];
+
+  return (
+    <div class={bem()} style={{ height: `${height}px` }} {...inherit(ctx)}>
+      <div class={bem('nav')}>
+        {items.map((item, index) => (
+          <div
+            key={index}
+            class={[
+              'van-ellipsis',
+              bem('nitem', {
+                active: mainActiveIndex === index,
+                disabled: item.disabled
+              })
+            ]}
+            onClick={() => {
+              if (!item.disabled) {
+                emit(ctx, 'navclick', index);
+              }
+            }}
+          >
+            {item.text}
+          </div>
+        ))}
+      </div>
+      <div class={bem('content')}>
+        {subItems.map(item => (
+          <div
+            key={item.id}
+            class={[
+              'van-ellipsis',
+              bem('item', {
+                active: activeId === item.id,
+                disabled: item.disabled
+              })
+            ]}
+            onClick={() => {
+              if (!item.disabled) {
+                emit(ctx, 'itemclick', item);
+              }
+            }}
+          >
+            {item.text}
+            {activeId === item.id && (
+              <Icon name="checked" size="16px" class={bem('selected')} />
+            )}
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}
+
+TreeSelect.props = {
+  items: Array,
+  mainActiveIndex: Number,
+  activeId: {
+    type: [Number, String],
+    default: 0
+  },
+  height: {
+    type: Number,
+    default: 300
+  }
+};
+
+export default sfc<TreeSelectProps>(TreeSelect);
diff --git a/packages/tree-select/test/index.spec.js b/packages/tree-select/test/index.spec.js
index c02620a0d..79f8b9295 100644
--- a/packages/tree-select/test/index.spec.js
+++ b/packages/tree-select/test/index.spec.js
@@ -6,10 +6,12 @@ test('empty list', () => {
 });
 
 test('select item', () => {
+  const onItemClick = jest.fn();
   const item = {
     text: 'city1',
     id: 1
   };
+
   const wrapper = mount(TreeSelect, {
     propsData: {
       items: [{
@@ -19,12 +21,17 @@ test('select item', () => {
           { ...item, disabled: true }
         ]
       }]
+    },
+    context: {
+      on: {
+        itemclick: onItemClick
+      }
     }
   });
 
   const items = wrapper.findAll('.van-tree-select__item');
   items.at(0).trigger('click');
-  expect(wrapper.emitted('itemclick')[0][0]).toEqual(item);
+  expect(onItemClick.mock.calls[0][0]).toEqual(item);
   items.at(1).trigger('click');
-  expect(wrapper.emitted('itemclick')[1]).toBeFalsy();
+  expect(onItemClick.mock.calls[1]).toBeFalsy();
 });