diff --git a/packages/vant/src/tree-select/TreeSelect.tsx b/packages/vant/src/tree-select/TreeSelect.tsx
index 0aef98b05..bfa35bd4b 100644
--- a/packages/vant/src/tree-select/TreeSelect.tsx
+++ b/packages/vant/src/tree-select/TreeSelect.tsx
@@ -112,9 +112,10 @@ export default defineComponent({
 
     const onSidebarChange = (index: number) => {
       emit('update:mainActiveIndex', index);
-      emit('click-nav', index);
     };
 
+    const onClickSidebarItem = (index: number) => emit('click-nav', index);
+
     const renderSidebar = () => {
       const Items = props.items.map((item) => (
         <SidebarItem
@@ -123,6 +124,7 @@ export default defineComponent({
           badge={item.badge}
           class={[bem('nav-item'), item.className]}
           disabled={item.disabled}
+          onClick={onClickSidebarItem}
         />
       ));
 
diff --git a/packages/vant/src/tree-select/test/index.spec.tsx b/packages/vant/src/tree-select/test/index.spec.tsx
index c195dfbf0..46a228ec8 100644
--- a/packages/vant/src/tree-select/test/index.spec.tsx
+++ b/packages/vant/src/tree-select/test/index.spec.tsx
@@ -26,7 +26,23 @@ test('should render empty TreeSelect correctly', () => {
   expect(mount(TreeSelect).html()).toMatchSnapshot();
 });
 
-test('should emit click-nav event when nav item is clicked', () => {
+test('should emit update:mainActiveIndex event when mainActiveIndex is changed', async () => {
+  const wrapper = mount(TreeSelect, {
+    props: {
+      items: mockItems,
+      mainActiveIndex: 0,
+    },
+  });
+
+  const navItems = wrapper.findAll('.van-tree-select__nav-item');
+  await navItems[0].trigger('click');
+  expect(wrapper.emitted('update:mainActiveIndex')).toBeFalsy();
+
+  await navItems[1].trigger('click');
+  expect(wrapper.emitted('update:mainActiveIndex')?.[0]).toEqual([1]);
+});
+
+test('should emit click-nav event when nav item is clicked', async () => {
   const wrapper = mount(TreeSelect, {
     props: {
       items: mockItems,
@@ -34,9 +50,10 @@ test('should emit click-nav event when nav item is clicked', () => {
   });
 
   const navItems = wrapper.findAll('.van-tree-select__nav-item');
-  navItems[1].trigger('click');
-  expect(wrapper.emitted('update:mainActiveIndex')?.[0]).toEqual([1]);
-  expect(wrapper.emitted('click-nav')?.[0]).toEqual([1]);
+  await navItems[0].trigger('click');
+  expect(wrapper.emitted('click-nav')?.[0]).toEqual([0]);
+  await navItems[0].trigger('click');
+  expect(wrapper.emitted('click-nav')?.[1]).toEqual([0]);
 });
 
 test('should emit click-item event when item is clicked', () => {