diff --git a/docs/web/api/tree.en-US.md b/docs/web/api/tree.en-US.md
index 8d028f3bf5..875195557a 100644
--- a/docs/web/api/tree.en-US.md
+++ b/docs/web/api/tree.en-US.md
@@ -111,3 +111,11 @@ Connects parent nodes in the tree with their child nodes at the same level. This
 ### Why doesn't the `onChange` callback return the value of the parent node when child node is selected in `valueMode = 'all'` mode?
 
 In `valueMode = 'all'` mode, the parent node will only appear in the selected values if all its child nodes are selected.
+
+### Why do other nodes get selected when I select a node?
+
+The `value` field of each item in the `data` array provided to the `Tree` component must be unique to avoid multiple selection issues caused by duplicate indices.
+
+### Why can't I expand nodes correctly even though I set `expanded`?
+
+The `value` field of each item in the `data` array provided to the `Tree` component must be unique to avoid incorrect expansion caused by duplicate indices.
\ No newline at end of file
diff --git a/docs/web/api/tree.md b/docs/web/api/tree.md
index 9cdb4f3ed1..07f3be17a5 100644
--- a/docs/web/api/tree.md
+++ b/docs/web/api/tree.md
@@ -115,3 +115,11 @@ spline: data
 ### 为什么在 `valueMode = 'all'` 模式下，选中子节点时 `onChange` 回调并没有返回父节点的值？
 
 在 `valueMode = 'all'` 模式下,必须当前子节点被全部选中后,父节点才会出现在选中值里面。
+
+###  为什么我选中了一个选中了一个节点，但是其他节点也有被选中的情况？
+
+提供给 `Tree` 组件的数组 `data` 数据中的每个 `value` 字段的值必须是唯一的，避免重复索引导致多选问题。
+
+###  为什么我设置了 `expanded` 却不能正确展开节点？
+
+提供给 `Tree` 组件的数组 `data` 数据中的每个 `value` 字段的值必须是唯一的，避免重复索引导致不能正确展开。