<el-select v-model="addform1.zone2" value-key="id" @change="getCityByProvinceId(addform1.zone2.id)" placeholder="請選擇" style="width:200px;height:30px;margin-left:10px;">
<el-option v-for="item in form1.zone2" :key="item.id" :label="item.name" :value="item" style="width:200px;height:30px;">
</el-option>
</el-select>
elementUI select value綁定值為obiect是顯示錯誤，給el-select標簽加 value-key="id" 屬性，同時el-option 的 key值為id即可