Abstract: In response to the problem of insufficient business data sharing and collaboration of business systems in the design, manufacturing, construction, operation and maintenance stages of high-speed railway catenary system, this paper conducted research on the full lifecycle management of high-speed railway catenary system based on BIM (Building Information Modeling) technology, in accordance with the requirements of catenary system engineering management and the management concept of intelligent high-speed railway "module integration, axis surface collaboration". The paper constructed a modular integrated platform for the full lifecycle management of catenary system through key technologies such as BIM model and data integration transmission, BIM model transmission transformation, and lightweighting. The platform has been validated in multiple stages during the construction of the Chongqing - Kunming high-speed railway, comprehensively promoted the intelligent improvement and high-quality development of catenary system engineering.