Abstract:Urban drainage pipes undertake the tasks such as the conveyance and discharge of urban sewage and rainwater, and are the basis for the smooth and safe operation of the city. The aging situations of drainage pipeline are invisible. It is hard to know the situations of underground pipelines on the ground, which will bring the economic loss to the pipeline owners, and also bring the public pressure. Therefore, the application of pipeline trenchless restoration technology is significant. Combined with an example of the built sewage pipeline restoration project in a southern area, the trenchless restoration technology is studied, and its application in the restoration of municipal pipeline network is further analyzed.