SOURCE

new Vue({
    data() {
        const data = [{
            id: 1,
            label: '一级 1',
            disabled: true,
            children: [{
                id: 4,
                label: '二级 1-1',
                disabled: true,
                children: [{
                    id: 9,
                    label: '三级 1-1-1',
                    disabled: true,
                }, {
                    id: 10,
                    label: '三级 1-1-2',
                    disabled: true,
                }]
            }]
        }, {
            id: 2,
            label: '一级 2',
            disabled: true,
            children: [{
                id: 5,
                label: '二级 2-1',
                disabled: true,
            }, {
                id: 6,
                label: '二级 2-2',
                disabled: true,
            }]
        }, {
            id: 3,
            label: '一级 3',
            disabled: true,
            children: [{
                id: 7,
                label: '二级 3-1',
                disabled: true,
            }, {
                id: 8,
                label: '二级 3-2',
                disabled: true,
            }]
        }];
        return {
            data: JSON.parse(JSON.stringify(data))
        };
    },
    methods: {
        append(data) {
            const newChild = { id: id++, label: 'testtest', children: [] };
            if (!data.children) {
                this.$set(data, 'children', []);
            }
            data.children.push(newChild);
        },

        remove(node, data) {
            const parent = node.parent;
            const children = parent.data.children || parent.data;
            const index = children.findIndex(d => d.id === data.id);
            children.splice(index, 1);
        },
        eit(data) {
            console.log(data)
            data.disabled = !data.disabled
        }

    }
}).$mount('#app')

<div id="app">
 <p>使用 scoped slot</p>
    <el-tree
      :data="data"
      show-checkbox
      node-key="id"
      default-expand-all
      :expand-on-click-node="false">
      <span class="custom-tree-node" slot-scope="{ node, data }">
        <span>{{ node.label }}</span>
        <el-input :disabled="data.disabled" size="mini" style="width:35%"></el-input>
        <span>
          <el-button
            type="text"
            size="mini"
            @click="() => append(data)">
            Append
          </el-button>
          <el-button
            type="text"
            size="mini"
            @click="() => remove(node, data)">
            Delete
          </el-button>
          <el-button
            type="text"
            size="mini"
            @click="eit(data)">
            eit
          </el-button>
        </span>
      </span>
    </el-tree>
</div>

 .custom-tree-node {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
    padding-right: 8px;
  }