这种是原先的写法
<el-select
v-model="form.users"
placeholder="请选择人员"
style="width: 270px"
:multiple="true"
>
<el-option
v-for="item in sblx_ry_all"
:key="item.userId"
:label="item.userName"
:value="item.userId"
/>
</el-select>
需要加上$forceUpdate() 进行强制刷新
<el-select
v-model="form.users"
placeholder="请选择人员"
style="width: 270px"
@change = "$forceUpdate()"
:multiple="true"
>
<el-option
v-for="item in sblx_ry_all"
:key="item.userId"
:label="item.userName"
:value="item.userId"
/>
</el-select>