提出了一种特别适用于海洋激光雷达系统的高效率的蒙特卡罗模拟方法。与传统的模拟方法相比，该方法在模拟过程中充分地利用了辐射传输过程中的概率知识，因此，大大地降低了模拟的方差，提高了计算效率。利用该方法在微机上对一实际雷达系统的模拟结果进行显示，结果表明：该方法在计算效率大为提高的同时仍保证了良好的计算精度，可以满足系统模拟的需要，为在微机上实现海洋激光雷达系统的蒙特卡罗模拟，提供了一种切实可行的方法。 A highly efficient Monte-Carlo simulation method is proposed which is especially suitable for marine lidar systems. Compared with the traditional simulation methods, this method makes full use of the probability knowledge in the radiation transmission process in the simulation process, thus greatly reducing the variance of the simulation and improving the computational efficiency. The simulation results of an actual radar system are displayed on a microcomputer using this method. The results show that the proposed method can not only improve the computational efficiency but also ensure the good computational accuracy, and meet the needs of system simulation. Monte Carlo simulation of a marine lidar system provides a practical approach.