效果如图

1.安装element-china-area-data

npm install element-china-area-data

2.在需要的页面引入并使用

<el-cascader
     style="width: 100%;"
     :options="optionsArr" v-model="address
     clearable placeholder="请选择所属地区">
     <template #default="{ data }">
         <span>{{ data.label }}</span>
     </template>
</el-cascader>

import{ regionData } from 'element-china-area-data'
const optionsArr = ref(regionData)

3.若需要在其他地方回显

import{ codeToText } from 'element-china-area-data'

const getCodeToText = (codeStr) => {
    let codeArray = codeStr.split(",");
    let area = codeToText[codeArray[0]] +  codeToText[codeArray[1]] + codeToText[codeArray[2]];
    return area;
}