html代码

                     <el-table-column
                        prop="value"
                        width="145"
                      >
                        <template slot-scope="{row}">
                          <svg-icon v-if="row.value > 0" icon-class="0-down-arrow" class-name="up-arrow" ></svg-icon>
                          <svg-icon v-else icon-class="0-down-arrow" class-name="down-arrow" ></svg-icon>
                        </template>
                      </el-table-column>

箭头svg图标 0-down-arrow.svg

<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg t="1585706706666" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="21264" width="20" height="20" xmlns:xlink="http://www.w3.org/1999/xlink"><defs><style type="text/css"></style></defs><path d="M895.26 511.972a29.867 29.867 0 0 1 22.13 49.92L534.13 985.23a29.867 29.867 0 0 1-44.26 0L106.61 561.892a29.867 29.867 0 0 1 22.13-49.92h177.436V58.312c0-16.499 13.369-29.868 29.867-29.868h351.914c16.498 0 29.867 13.37 29.867 29.867v453.66H895.26z" p-id="21265"></path></svg>

位置

对应样式

<style lang="scss" scoped>
.down-arrow {
  color: #47da2a;
}
.up-arrow {
  color: #d64e18;
  transform: rotate(180deg);
}
</style>

效果