Taking Huachao Industrial Park in Yubei District of Chongqing as the research object, single scheme and combined scheme of biological detention pool, permeable pavement and green roof were designed respectively, and SWMM was constructed to simulate the effects of different schemes on the study area. The simulation results show that the runoff reduction effect of low impact development(LID)measures is more significant when the recurrence period is 2 years or 10 years. The runoff control effect and flood peak reduction effect of the single scheme of permeable pavement is more significant. The runoff control effect of the combined scheme is better than the sum value of single schemes, which shows that they have a positive impact on each other. The peak reduction effect of the combined arrangement scheme is lower than the sum value of single schemes, which indicates that they have negative effects on each other.