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<el-cascader :options="options" :props="{ checkStrictly: true }" v-model="ksCascader"
ref="ksCascaderRef">
  <template slot-scope="{ node, data }">
  
    
    <template v-if="node.level==1">
      <span class="el-icon-folder-opened" style="margin-right: 10px;font-size: 16px;">span>
      <span>{{ data.label }}span>
    template>
    
    
    <template v-else>
      <el-radio v-model="radioKs" :label="data.value" @change="selectRadio(node)">
        <span>{{ data.label }}span>
      el-radio>
    template>
  template>
el-cascader>

radioKs:'',
ksCascader:['zhinan','shejiyuanze','fankui'],


selectRadio(node){
  console.log('选中的值：',this.radioKs) // 某一级的value值
  console.log('节点：',node)

  // 要获取到父级所有的id的list才行
  this.pArr = []
  let p =  this.getParentIds(node)
  console.log(this.pArr )
  // this.ksCascader = ['zhinan','shejiyuanze','yizhi']
  this.ksCascader = this.pArr
  
  this.ksCascaderChange()
  
  this.$nextTick(()=>{
    console.log('实例化：',this.$refs.ksCascaderRef)
    // 弹框隐藏
    this.$refs.ksCascaderRef.toggleDropDownVisible()
  })
},

getParentIds(node){
  this.pArr.unshift(node.value)
  if(node.parent){
    this.getParentIds(node.parent)
  }
},

// cascader的change事件
ksCascaderChange(){
  console.log('zhixinglema')
},

自己增加了一个radio，所以默认的radio都要隐藏掉。

popper-class="ks-new-cascader"，自定义自己的样式

.el-popper {
  //background: #FEfefe;
  .el-cascader-node{
    //background: #feeeed !important;

    &>label {
      display: none !important;
      //.el-radio__input{
      //  display: none !important;
      //}
    }
  }  
}