MonteCarlo方法模拟多次散射激光雷达接收信号是一种经典方法，但这种方法的最大缺点是计算时间很长．为提高计算效率，本文在传统的半解析MonteCarlo方法的基础上，使用Henyey－Greenstein函数的修正公式来表示散射相位函数，计算出每个散射点处光子不发生进一步散射而直接到达接收机的概率．模拟结果显示，一、二、三次散射起主要作用，但随着海水衰减系数和接收机视场角的增大，高次散射对激光雷达的接收信号的作用也越来越强． The MonteCarlo method is a classical method to simulate the received signal of multiple scattering lidar. However, the biggest drawback of this method is that the calculation time is very long. In order to improve the computational efficiency, based on the traditional semi-analytical Monte Carlo method, the correction formula of Henyey-Greenstein function is used to represent the scattering phase function, and the probability that the photon arrives at the receiver without further scattering at each scattering point is calculated . Simulation results show that primary, secondary and tertiary scattering plays a major role. However, with the increase of seawater attenuation coefficient and receiver angle of view, the effect of high-order scattering on the received signal of lidar becomes stronger and stronger.