<el-table ref="multipleTable" :data="appList" border tooltip-effect="dark" style="width: 100%;height: 380px;overflow:auto" @selection-change="changeFun">
                <el-table-column type="selection" width="55" class="selection" prop='uuid' :selectable='checkboxInit' @selection-change
 
="changeFun"></el-table-column>

                <el-table-column label="">
                  <template scope="scope"></template>
                </el-table-column>
                <el-table-column prop="username" label="username"></el-table-column>
                <
 
el-table-column prop="createTime" label="建立時間"></el-table-column>
              </el-table>

設定此屬性@selection-change="changeFun"，意思是每次勾選的時候都會觸發這個事件

  //複選框狀態改變
    changeFun(val) {
      this.multipleSelection = val;
    },

再在資料中心設定multipleSelection:[]就可以了
後面需要就用this.multipleSelection直接獲取吧