Permeable pavement has been more and more used in urban road construction, sponge city construction, and Landscape engineering because of its good rainwater management ability, preventing skid, noise, glare, beautiful visual effect and improving driving safety. Tahe rainwater effect of different permeable pavement methods under different rainfall conditions has a great role in guiding the design of permeable pavement roads. This paper plans to analyze and study through experiments and models. In order to investigate the effect of different permeable pavements, the relevant parameters of different permeable bricks were obtained through experiments, and then the flood effect of different permeable pavements were simulated by storm water management model (SWMM), and the changes of peak present time, flood peak flow and runoff coefficient were analyzed. The results show that the peak flow and runoff coefficient can be significantly reduced by permeable pavements; The greater the rainfall frequency, The production time and peak occurrence time are more delayed, The more the runoff coefficient decreases, For the rainfall at the return period of 2-y, An reduction of 12% compared to impervious pavement conditions, The peak production time was delayed by 5–30 min, The runoff coefficient decreased by 23.1%; The variation of flood peak flow and runoff coefficient of different permeable pavements under the same rainfall event is not much different, But the peak time is different. Compared with other permeable pavements, The porosity of # 4-permeable brick is larger, peak present time is delayed by about 15–20 min.