主要是利用filter-node-method來過濾

 <el-tree :data="data"
      show-checkbox
      default-expand-all
      node-key="code"
      ref="tree"
      highlight-current
      :props="defaultProps"
      :expand-on-click-node="false"
      :check-on-click-node="true"
      :filter-node-method="handleTreeFilter"
      @check-change="checkChange">

handleTreeFilter(value, data, node) {
 return node.checked || node.indeterminate
}
this.$nextTick(() => {
 this.$refs.tree.filter()
})