Due to the fact that a disorderly pipeline location at the municipal water supply inlets leads to the restriction of municipal water supply and drainage flow, as well as an increase of the urban losses brought about by such extreme weather events as rainstorm or other emergencies, it is therefore advisable to optimize municipal water supply and drainage engineering based on sponge city concept. According to the layout of municipal pipelines at the water supply inlet points, the residual pressure water supply interval of municipal water supply can be calculated, with the outlet elevation of municipal drainage pipes determined within the interval range. The relationship between the total flow rate of nozzles and the area of pipeline action can be determined on the basis of the outlet elevation of municipal drainage pipes. With the average water distribution branch pipe designed, the flow rate of each section of the water distribution branch pipe can be converted, followed by a calculation of the flow coefficient between the distribution branch pipes so as to complete the municipal drainage design. Meanwhile, the mechanical template space is to be divided inside the project engineering system pipeline, with the horizontal pipeline construction completed according to the pipeline. The result analysis shows that within the same efficiency range, the municipal water supply and drainage pressurization equipment based on the sponge city concept are characterized with a higher durability and a larger pipeline drainage flow, thus guaranteeing the integration effect of the sponge city concept with the municipal water supply and drainage design process.