Abstract: With the advancement of urbanization in China, many early-built water supply and drainage systems have entered an aging operation phase, with prominent problems such as pipeline leakage, combined rainwater and sewage, and urban flooding. In order to update the renewal of water supply and drainage networks and enhance the level of municipal infrastructure, this article explores specific solutions to the problems and difficulties in the implementation of water supply and drainage networks based on the drainage pipeline repair project in Fuyang City. Improve the connection between new and old pipelines in terms of elevation, materials and construction sequence by optimizing the pipe materials and layout. The adoption of construction techniques such as non-excavation pipeline repair can enhance the utilization rate of underground space and reduce the impact on roads and the surrounding environment. Establishing a rainwater and sewage separation system can prevent the pollution of the water environment caused by the combined flow. The application of a diversified governance strategy that integrates "green, gray and blue" to build a sponge ecosystem can resist the risk of urban flooding. Strengthen the full-cycle management of the project to ensure the regular and stable operation of the pipeline network. The comprehensive adoption of the above measures will promote high-quality development of new-type urbanization and provide certain theoretical support and technical guidance for urban development.