实现代码 

<template>
  <div :class="$options.name">
    <el-table
      style="user-select: none"
      ref="table"
      :data="tableData"
      :row-class-name="row_class_name"
      @mousedown.native="mousedownTable"
      @row-click="row_click"
      @cell-mouse-enter="cell_mouse_enter"
      @cell-mouse-leave="cell_mouse_leave"
      @mouseup.native="mouseupTable"
      @mouseleave.native="mouseupTable"
      @selection-change="selection_change"
    >
      <el-table-column type="selection" width="50" :selectable="selectable" />
      <el-table-column type="index" label="序号" width="60" />
      <el-table-column prop="ID" label="ID" />
      <el-table-column prop="username" label="用户名" />
    </el-table>
  </div>
</template>
<script>
export default {
  name: "sgBody",
  components: {},
  data() {
    return {
      isMousedownTable: false, //是否按下表格
      currentEnterRow: null, //当前移入的行数据
      tableData: [
        { ID: "330110198704103091", username: "username1" },
        { ID: "330110198704103092", username: "username2" },
        { ID: "330110198704103093", username: "username3" },
        { ID: "330110198704103094", username: "username4", disabled: true },
        { ID: "330110198704103095", username: "username5" },
        { ID: "330110198704103096", username: "username6" },
        { ID: "330110198704103097", username: "username7" },
        { ID: "330110198704103098", username: "username8" },
      ],
      selection: [], //表格选中项数组
    };
  },

  methods: {
    // 屏蔽复选框
    selectable(row) {
      return !row.disabled;
    },
    // 表格按下
    mousedownTable(d) {
      this.currentEnterRow &&
        !this.currentEnterRow.disabled &&
        this.$refs.table.toggleRowSelection(this.currentEnterRow);
      this.isMousedownTable = true;
    },
    // 单击表格行
    row_click(row, column, event) {
      this.currentEnterRow || (!row.disabled && this.$refs.table.toggleRowSelection(row));
    },
    // 进入单元格
    cell_mouse_enter(row, column, cell, event) {
      this.isMousedownTable && !row.disabled && this.$refs.table.toggleRowSelection(row);
      this.currentEnterRow = row;
    },
    // 离开单元格
    cell_mouse_leave(row, column, cell, event) {
      this.currentEnterRow = null;
    },
    // 鼠标弹起或者离开表格
    mouseupTable(d) {
      this.isMousedownTable = false;
    },
    // 表格选中项发生改变
    selection_change(selection) {
      this.selection = selection;
    },
    // 表格每行样式
    row_class_name({ row, rowIndex }) {
      if (row.disabled) return "disabled";
      return this.selection.find((v) => v.ID == row.ID) ? "selected" : "";
    },
  },
};
</script>
<style lang="scss" scoped>
.sgBody {
  >>> .el-table {
    $bgColor: #409eff11;
    tr {
      // 高亮选中行
      &:hover,
      &.selected {
        td {
          background-color: $bgColor !important;
        }
      }
      // 禁用行
      &.disabled {
        $bgColor: #eee;
        td {
          background-color: $bgColor !important;
        }
      }
    }
  }
}
</style>