解決辦法：@change="$forceUpdate()" 添加這個即可

完整代碼：

<template>
<el-form-item label="數(shù)據(jù)類型">
<el-select v-model="queryParams.searchDataType" placeholder="請選擇數(shù)據(jù)類型" clearable @change="$forceUpdate()">
<el-option
v-for="dict in dataTypeList"
:key="dict.value"
:label="dict.label"
:value="dict.value"
/>
</el-select>
</el-form-item>
</template>


<script>
export default {
data() {
return {
// 查詢參數(shù)
queryParams: {},
dataTypeList: [
{label:'實際數(shù)據(jù)',value:"1"},
{label:'客戶數(shù)據(jù)',value:"2"}
],
};
},
created() {
this.queryParams.searchDataType='1'
},
methods: {}
}
</script>