<style scoped>
::v-deep .el-form-item__label {
  display: inline;
  text-align-last: justify;
}
</style>

需要给两个form设置同样的label-width

			<el-form-item label="信号机名称" label-width="75px">
                    <el-input type="text" v-model="props.info.content.name"></el-input>
                  </el-form-item>
                  <el-form-item label="咽喉" label-width="75px">
                    <el-select v-model="props.attr.yhData" placeholder="请选择" @change="handleChange()">
                      <el-option label="上行咽喉" :value="parseInt('1')"></el-option>
                      <el-option label="下行咽喉" :value="parseInt('0')"></el-option>
                    </el-select>
                  </el-form-item>

效果如图所示