Abstract: The signal system was taken as the research object, this paper created a three-dimensional virtual model of signaling equipment based on BIM, applied database technology to store and manage the data, set the data exchange interface to implement the data exchange between signal equipment maintenance data and BIM data, designed the metro signaling equipment maintenance management system based on BIM. This system architecture was with the real scene of metro signal system maintenance, has the characteristics of strong interactivity and simple operation, was used in the metro signal system in many cities. The application effect was good. It made up insufficient that huge data were not easy to interpret for the traditional signal system, was of great significance for the optimization of signal system architecture, improve system utilization efficiency.