绑定属性expanded，树自带方法this.$refs.tree.store.root.expanded，在mounted方法中给树方法赋值expandAll = false，具体代码实现详情如下：

html代码：

<template><el-treeref="tree":data="showDepData"expand-on-click-node="false":props="{label: 'name'}"node-key="deptId"highlight-current:default-expand-all="expanded"@node-click="changeDepClick"><span slot-scope="{ node, data }"><iv-if="node.level == 1"style="margin-right: 4px"class="wk wk-customer"/>{{ data.name }}</span></el-tree></template

js代码：

data(){return{
expanded:false
}}mounted(){
//获取树自带的属性并给他赋值false
this.$refs.store.root.expanded = expanded}