父组件代码

<!-- 父组件 -->
<template> 
  <div class="abutton">
    <el-button type="primary" @click="clicked">点击</el-button>
    <mode-one ref="firstDom" class="mode"></mode-one>
  </div>
</template>

<script>
import modeOne from './modeOne.vue'
export default {
  components: { modeOne },
  data(){
    return{}
  },
  methods:{
    clicked(){
      // 父组件要传到子组件的数据
      let form = {
        name: '中百超市大促销',
        region: '中百超市',
        date1: '2021-07-17',
        delivery: true,
        type: ['美食/餐厅线上活动','地推活动','线下主题活动','单纯品牌曝光'],
        desc: '线上品牌商赞助'
      }

      // setData为父组件向子组件传值自定义的方法名
      this.$refs.firstDom.setData(form)
    }

  }
}
</script>
<style lang="less" scoped>
.mode{
  width: 500px;
  margin: auto;
}
</style>

子组件代码

<!-- 子组件 -->
<template> 
  <div>
    <el-form ref="form" :model="form" label-width="80px">
      <el-form-item label="活动名称">
        <el-input v-model="form.name"></el-input>
      </el-form-item>
      <el-form-item label="活动区域">
        <el-input v-model="form.region"></el-input>
      </el-form-item>
      <el-form-item label="活动时间">
        <el-date-picker type="date" value-format="yyyy-MM-dd" placeholder="选择日期" v-model="form.date1" style="width: 100%;"></el-date-picker>
      </el-form-item>
      <el-form-item label="即时配送">
        <el-switch v-model="form.delivery"></el-switch>
      </el-form-item>
      <el-form-item label="活动性质">
        <el-checkbox-group v-model="form.type">
          <el-checkbox label="美食/餐厅线上活动" name="type"></el-checkbox>
          <el-checkbox label="地推活动" name="type"></el-checkbox>
          <el-checkbox label="线下主题活动" name="type"></el-checkbox>
          <el-checkbox label="单纯品牌曝光" name="type"></el-checkbox>
        </el-checkbox-group>
      </el-form-item>
      <el-form-item label="活动形式">
        <el-input type="textarea" v-model="form.desc"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="onSubmit">立即创建</el-button>
        <el-button>取消</el-button>
      </el-form-item>
    </el-form>   
  </div>
</template>

<script>
export default {
  data(){
    return{
      form: {
        name: '',
        region: '',
        date1: '',
        delivery: false,
        type: [],
        desc: ''
      }
    }
  },
  methods:{
    // 子组件接收父组件传值对应的同名方法    
    setData(data){
      this.form = data   //父组件传过来的值
    },
    onSubmit(){
      console.log(this.form)
    }
  }
}  
</script>