In order to solve the problems of water safety and water environment in the process of urbanization in China, combined with the construction concept of sponge city and the goal of comprehensive river regulation, the application scope, advantages and disadvantages of SWMM model and MIKE11 model were analyzed. The results show that SWMM model is widely used in the simulation of total runoff control and non-point source pollution reduction, but it cannot simulate the convection diffusion and biochemical process of pollutants in river channels. MIKE 11 river network model is widely used in the simulation of urban river water quantity and quality. It can predict the changes of river water environment under specific conditions, but it cannot reflect the impact of land-based non-point source pollution on river water quality. SWMM-MIKE 11 coupling model can be built by using the SWMM to model the sponge facilities and rainwater pipe network, and importing the pipe network discharge flow of SWMM as the boundary condition into MIKE 11 model, so as to realize the complementary advantages of the two.