With the acceleration of urbanization construction and the increasing maturity of urban construction in China, the construction of municipal drainage pipe networks, public pipelines, rail transit subway and other municipal facilities has increasingly highlighted the scarcity of underground space and the importance of drainage planning first. Based on the project characteristics and complex boundary conditions of Zhoudeng Highway Trunk Sewer Improvement Project in Pudong New Area, a new idea of sewage pipe construction in the narrow underground space is provided by using the new technology and new materials on the basis of analyzing and sorting out the underground pipelines, above-ground structures, bridge structures, traffic pressure and the other constraints.