diff --git a/src/tree-select/README.md b/src/tree-select/README.md
index 3b9e3ca22..5b909faa0 100644
--- a/src/tree-select/README.md
+++ b/src/tree-select/README.md
@@ -149,7 +149,7 @@ export default {
 import { ref } from 'vue';
 
 export default {
-  data() {
+  setup() {
     const activeIndex = ref(0);
     return {
       activeIndex,
diff --git a/src/tree-select/README.zh-CN.md b/src/tree-select/README.zh-CN.md
index cc9dd07f3..c98841027 100644
--- a/src/tree-select/README.zh-CN.md
+++ b/src/tree-select/README.zh-CN.md
@@ -157,7 +157,7 @@ export default {
 import { ref } from 'vue';
 
 export default {
-  data() {
+  setup() {
     const activeIndex = ref(0);
     return {
       activeIndex,