diff --git a/src/components/TreeTable/eval.js b/src/components/TreeTable/eval.js
index dfaac808..d9b89e1c 100644
--- a/src/components/TreeTable/eval.js
+++ b/src/components/TreeTable/eval.js
@@ -4,11 +4,11 @@
 */
 'use strict'
 import Vue from 'vue'
-export default function treeToArray(data, expandedAll, parent = null, level = null) {
+export default function treeToArray(data, expandAll, parent = null, level = null) {
   let tmp = []
   Array.from(data).forEach(function(record) {
     if (record._expanded === undefined) {
-      Vue.set(record, '_expanded', expandedAll)
+      Vue.set(record, '_expanded', expandAll)
     }
     let _level = 1
     if (level !== undefined && level !== null) {
@@ -21,7 +21,7 @@ export default function treeToArray(data, expandedAll, parent = null, level = nu
     }
     tmp.push(record)
     if (record.children && record.children.length > 0) {
-      const children = treeToArray(record.children, expandedAll, record, _level)
+      const children = treeToArray(record.children, expandAll, record, _level)
       tmp = tmp.concat(children)
     }
   })
diff --git a/src/components/TreeTable/index.vue b/src/components/TreeTable/index.vue
index 4ec22447..071352a8 100644
--- a/src/components/TreeTable/index.vue
+++ b/src/components/TreeTable/index.vue
@@ -58,7 +58,7 @@ export default {
         tmp = this.data
       }
       const func = this.evalFunc || treeToArray
-      const args = this.evalArgs ? Array.concat([tmp], this.evalArgs) : [tmp, this.expandAll]
+      const args = this.evalArgs ? Array.concat([tmp, this.expandAll], this.evalArgs) : [tmp, this.expandAll]
       return func.apply(null, args)
     }
   },
diff --git a/src/components/TreeTable/readme.md b/src/components/TreeTable/readme.md
index 1db26006..2a3b5af8 100644
--- a/src/components/TreeTable/readme.md
+++ b/src/components/TreeTable/readme.md
@@ -70,11 +70,11 @@
 #### evalArgs
   解析函数的参数，是一个数组
 
-  **请注意，自定义的解析函数参数第一个为this.data，你不需要在evalArgs填写。** *this.data为需要解析的数据*
+  **请注意，自定义的解析函数参数第一个为this.data，第二个参数为， this.expandAll,你不需要在evalArgs填写。一定记住，这两个参数是强制性的，并且位置不可颠倒** *this.data为需要解析的数据，this.expandAll为是否默认展开*
 
-  如你的解析函数需要的参数为`(this.data,1,2,3,4)`，那么你只需要将`[1,2,3,4]`赋值给`evalArgs`就可以了
+  如你的解析函数需要的参数为`(this.data, this.expandAll,1,2,3,4)`，那么你只需要将`[1,2,3,4]`赋值给`evalArgs`就可以了
   
-  如果你的解析函数参数只有一个`(this.data)`,那么就可以不用填写evalArgs了
+  如果你的解析函数参数只有`(this.data, this.expandAll)`,那么就可以不用填写evalArgs了
   
   具体可参考[*customEval.js*](https://github.com/PanJiaChen/vue-element-admin/blob/master/src/views/example/table/treeTable/customEval.js)的函数参数和[customTreeTable](https://github.com/PanJiaChen/vue-element-admin/blob/master/src/views/example/table/treeTable/customTreeTable.vue)的`evalArgs`属性值
 
diff --git a/src/views/example/table/treeTable/customEval.js b/src/views/example/table/treeTable/customEval.js
index 6eac3928..73badb68 100644
--- a/src/views/example/table/treeTable/customEval.js
+++ b/src/views/example/table/treeTable/customEval.js
@@ -4,12 +4,12 @@
 */
 'use strict'
 import Vue from 'vue'
-export default function treeToArray(data, parent, level, expandedAll, item) {
+export default function treeToArray(data, expandAll, parent, level, item) {
   const marLTemp = []
   let tmp = []
   Array.from(data).forEach(function(record) {
     if (record._expanded === undefined) {
-      Vue.set(record, '_expanded', expandedAll)
+      Vue.set(record, '_expanded', expandAll)
     }
     let _level = 1
     if (level !== undefined && level !== null) {
@@ -40,7 +40,7 @@ export default function treeToArray(data, parent, level, expandedAll, item) {
     }
     tmp.push(record)
     if (record.children && record.children.length > 0) {
-      const children = treeToArray(record.children, record, _level, expandedAll, item)
+      const children = treeToArray(record.children, expandAll, record, _level, item)
       tmp = tmp.concat(children)
     }
   })
diff --git a/src/views/example/table/treeTable/customTreeTable.vue b/src/views/example/table/treeTable/customTreeTable.vue
index 773b7fdd..4ebf428a 100644
--- a/src/views/example/table/treeTable/customTreeTable.vue
+++ b/src/views/example/table/treeTable/customTreeTable.vue
@@ -5,7 +5,7 @@
       <a href="https://github.com/PanJiaChen/vue-element-admin/tree/master/src/components/TreeTable" target="_blank">Documentation</a>
     </el-tag>
 
-    <tree-table :data="data" :evalFunc="func" :evalArgs="args" border>
+    <tree-table :data="data" :evalFunc="func" :evalArgs="args" :expandAll="expandAll" border>
       <el-table-column label="事件">
         <template slot-scope="scope">
           <span style="color:sandybrown">{{scope.row.event}}</span>
@@ -48,6 +48,7 @@ export default {
   data() {
     return {
       func: treeToArray,
+      expandAll: false,
       data:
         {
           id: 1,
@@ -123,7 +124,7 @@ export default {
             }
           ]
         },
-      args: [null, null, true, 'timeLine']
+      args: [null, null, 'timeLine']
     }
   },
   methods: {