话不多说，解决问题是关键，直接开干：

html:

<div class="layui-form-item">
    <div class="layui-inline">
	<label class="layui-form-label">型号</label>
	    <div class="layui-input-inline" style="height:10px">
		<el-select v-model="modelId" @change="selectModel($event)" filterable collapse-tags   placeholder="请选择型号">
		<el-option :value="item.id" v-for="(item,index) in model" :key="item.id" :label="item.model" ></el-option>
		</el-select>
	    </div>
    </div>
</div>

js:

selectModel(id){
    let obj = {};
    obj = this.model.find((item)=>{//model就是上面的数据源
        return item.id === id;//筛选出匹配数据
    });
    vm.modelName=obj.model;
    console.log("modelName"+vm.modelName)
}