diff --git a/docs/treeDeep.md b/docs/treeDeep.md
index 0392605..90aafe2 100644
--- a/docs/treeDeep.md
+++ b/docs/treeDeep.md
@@ -1,13 +1,101 @@
-# treeDeep
-
-get max deep of tree
-
-## 调用
+# 树深度
 
 ```js
 treeDeep(tree, [options], [deep = 1])
 ```
 
+获取树状数据结构的最大树深度。
+
+## 参数
+
+|   参数    |   类型   | 默认 |               说明               |
+| --------- | -------- | ---- | -------------------------------- |
+| `tree`    | `tree`   |      | [树状结构数据](./param.md#tree)  |
+| `options` | `object` |      | [配置选项](./param.md#options)   |
+| `deep`    | `number` | `1`  | 初始深度，以此基础累加到最大深度 |
+
 ## 返回
 
-int
+| 参数 |   类型   |    说明    |
+| ---- | -------- | ---------- |
+| *    | `number` | 最大树深度 |
+
+## 示例
+
+::: code-group
+```js [调用]
+import { treeDeep } from '@axolo/tree-array'
+
+const tree = [{
+  id: 'home',
+  path: '/home',
+  parentId: null
+}, {
+  id: 'chart',
+  path: '/chart',
+  parentId: null,
+  children: [{
+    id: 'chartIndex',
+    path: '/chart/index',
+    parentId: 'chart',
+    children: [{
+      id: 'chartIndexTop',
+      path: '/chart/index/top',
+      parentId: 'chartIndex'
+    }, {
+      id: 'chartIndexActive',
+      path: '/chart/index/active',
+      parentId: 'chartIndex',
+      children: [{
+        id: 'chartIndexActiveMy',
+        path: '/chart/index/active/my',
+        parentId: 'chartIndexActive'
+      }]
+    }]
+  }, {
+    id: 'chartReview',
+    path: '/chart/review',
+    parentId: 'chart'
+  }, {
+    id: 'chartProject',
+    path: '/chart/project',
+    parentId: 'chart',
+    children: [{
+      id: 'chartProjectYou',
+      path: '/chart/project/you',
+      parentId: 'chartProject',
+      test: true
+    }, {
+      id: 'chartProjectMy',
+      path: '/chart/project/my',
+      parentId: 'chartProject',
+      children: [{
+        id: 'chartProjectMyOne',
+        path: '/chart/project/my/one',
+        parentId: 'chartProjectMy'
+      }, {
+        id: 'chartProjectMyTwo',
+        path: '/chart/project/my/two',
+        parentId: 'chartProjectMy'
+      }]
+    }]
+  }]
+}, {
+  id: 'smile',
+  path: '/smile',
+  parentId: null,
+  children: [{
+    id: 'smileIndex',
+    path: '/smile/index',
+    parentId: 'smile',
+    test: true
+  }]
+}]
+
+treeDeep(tree) // 4
+```
+
+```json [结果]
+4
+```
+:::