直接上代码~ 

                <el-tree
                  :data="item.pgxzdata"
                  show-checkbox
                  ref="tree"
                  highlight-current
                  node-key="id"
                  v-model="multipleSelection"
                  :props="defaultProps"
                  @check="(click, checked)=>{handleCheckChange(click, checked,index)}"
                ></el-tree>                <el-tree