Abstract: At present, more and more old roads are in urgent need of renovation. With the development of surrounding plots, the displacement of users increases. The flow of existing drainage pipes cannot meet the requirements of the latest users. At the same time, there are old and damaged pipelines, rain and sewage mixing, as well as silting problems. Huangzhong Road as an example, through rebuilding rain sewage pipeline, optimize the current rainwater mouth, set up sponge city measures, add rain sewage embedded pipe, etc., in order to solve the drainage problems of Huangzhong Road.