With the continuous development of urban modernization, problems appear in current underground pipeline information management in the old town area, including complex pipeline ownership and relationship, unclear underground pipeline layout, and etc. In order to solve these problems, a BIM-based digital management system for underground pipelines is proposed, and its role in the whole process of pipeline project is analyzed. Finally, the underground pipeline digital management system is applied to the Yangsigang Yangtze River Bridge project in Wuhan to achieve the functions of information classification, information retrieval, information visualization and collision detection for underground pipelines. The system effectively improves the management efficiency, increases the project revenue, and provides useful references for BIM technology combined with underground pipeline information management.