利用惠更斯原理和虚源方法建立了均匀海水中障碍物后声传播损失的计算模型，并用虚源方法对模型进行了数值实验验证。该模型在计算均匀海水中障碍物后的传播损失时，考虑了声波的衍射效应，得到了较为满意的结果。 By using the Huygens’ principle and the pseudo-source method, the acoustic propagation loss model in a uniform seawater is established. The model is verified by numerical experiments with the virtual source method. This model considers the diffraction effect of acoustic wave when calculating the propagation loss of obstacles in an even seawater, and obtains satisfactory results.