介绍了脉冲激光测距的工作原理 ,分析了脉冲激光测距存在的问题 ,在此基础上提出了激光多周期测距方法 ,即用接收到的回波信号驱动发射激光主波脉冲 ,从而形成振荡 ,通过测量多个周期内的时间积累后取平均而计算距离的一种方法。阐述该方法的基本工作原理 ,并就提高测量精度的方法和影响因素进行了分析。给出了实现该方法的系统组成框图 ,分析了提高其精度的关键技术 ,实验证明该方法是一种成本低、测量速度快、精度高的短距离测距新方法 The working principle of pulsed laser ranging is introduced, and the existing problems of pulsed laser ranging are analyzed. Based on this, the multi-period laser ranging method is proposed, which is to use the received echo signal to drive the main laser pulse, Oscillation, a method of calculating distance by measuring the time over multiple cycles and accumulating and then averaging. The basic working principle of the method is expounded, and the methods and influencing factors to improve the measurement accuracy are analyzed. The system block diagram of the method is given and the key technologies to improve its accuracy are analyzed. The experiment shows that the method is a new method of short distance measurement with low cost, high measurement speed and high precision