The characteristics of the void structure in pervious concrete have a great influence on the hydraulic performance of pervious concrete, and in order to analyze the effect of the void structure on the dynamic performance of pervious concrete, the simulation parameters of the pervious concrete test piece are studied by the method of establishing a random void structure model, and the simulation parameters are coMPared with the test results. First of all, determine the set allocation, target clearance rate and mate ratio of the specimen, prepare the maintenance molding after random cutting, the cutting surface of the void image image enhancement, threshold segmentation after the two-dimensional digital image, its void feature extraction analysis. Then, based on the actual void structure, with the help of finite element software ANSYS, combined with Monte Carlo method, random elliptical and random circular void simulation models are generated. The simulation results show that under the same void level, the random elliptical void model has larger overall stress and deformation than the random circular void model, and the internal stress concentration is more obvious. By comparing the simulation and test results with different void levels, the proposed value of the composite modulus of aggregate-cement slurry material in the random void simulation model is obtained.