以强激光应用在化学工程中所遇到的物理问题为背景，研究介质的热透镜效应、吸收强弱、吸收饱和程度以及介质的流动等因素对激光传播的影响。根据一组简化模型，提出了描述光场行为的方程组，给出了不同情况下介质的温度分布情况、光线在介质中的变化行为以及激光光强的分布变化情况。所得结果，对光化学工程设计有一定的参考价值。 Based on the physical problems of strong laser applications in chemical engineering, the influence of thermal lens effect, absorption intensity, absorption saturation and medium flow on laser propagation is studied. According to a set of simplified models, an equation system describing the behavior of the light field is proposed. The temperature distribution of the medium, the changing behavior of the light in the medium and the distribution of the laser light intensity are given under different conditions. The results obtained, the photochemical engineering design has some reference value.