为了快速合理地确定激光雷达几何因子反演关键参量——激光雷达比，利用雷达充满区几何因子值恒为1的属性提出一个简捷的新途径，对这种方法从理论上进行了推导，并以实际雷达数据进行了验证，反演得到的几何因子在充满区没有出现单调增加或者单调减小等不合理情况。结果表明，这种方法避免了目前激光雷达比需多次取值对结果定性分析繁琐耗时的不足，是合理有效的。这将对于反演出雷达几何因子并进而获得近地面气溶胶信息具有重要参考价值。

In order to quickly determine reasonable lidar ratio——the key parameter in the inversion of lidar geometric form factor,a simple and convenient method was presented to determine the lidar ratio for the geometrical form factor is a constant as 1 in lidar full zone. This method is theoretically deduced and verified with actual lidar data. The retrieved geometric form factor does not appear increasing or decreasing monotonously in full zone,which shows that this method is reasonable and effective,avoiding a large of qualitative analysis which is tedious and time consuming. It is useful to get lidar geometric form factor and obtain the surface aerosol important information.