解决方案

添加样式即可`style="white-space:pre;"`

<el-table-column prop="xxx" label="abc" align="center" min-width="150" show-overflow-tooltip>
            <template slot-scope="scope">
              <span v-html="scope.row.xxx" style="white-space:pre;"></span>
            </template>
</el-table-column>