通过对Mie散射相位函数的累积概率密度插值获得散射角，建立了激光在浑浊介质中传输的蒙特卡罗仿真模型。借助模型研究了激光在均匀单分散聚苯乙烯浑浊介质中的多次散射现象，探究了不同光学厚度和散射相位函数的浑浊介质对激光多次散射的影响。在研究中控制5 μm和10 μm两种粒径聚苯乙烯颗粒的浓度，改变浑浊介质的光学厚度分别为2、5和8，进行了理论仿真和实验的二维侧向散射图像比对，发现相同介质条件下仿真与实验得到的散射光强衰减百分比差异均小于16%，散射光强曲线走势基本一致。仿真还能够提供不同散射阶次光强大小的分布情况，能准确分析多次散射的影响。

The Monte Carlo model of laser scattering in turbid media was established with the help of scattering angle from the cumulative probability density interpolating of the Mie scattering phase function. With the model， the laser multiple scattering in uniform monodisperse polystyrene turbid medium was studied， the influence of turbid media with different optical depths and scattering phase function on laser multiple scattering was explored. By controlling the concentration of 5 μm and 10 μm size polystyrene particles， changing the optical depths of the turbid medium as 2， 5 and 8， the theoretical simulation and experimental side scattering images were obtained and compared. The percentage difference of scattering light intensity attenuation between the simulation and experiment is measured less than 16% under the same medium condition， and the trend of them is basically the same. The simulation can also provide the distribution of light intensity of different scattering orders， and accurately analyze the influence of multiple scattering.