Abstract: In order to effectively improve the level of informatization and intelligence in railway construction, this paper designed an intelligent construction management system based on BIM (Building Information Modeling) technology. Through automatic creation of entity structure trees, lightweight models, and other technologies, the paper implemented fine and modular control based on BIM data, assisted managers in effective decision-making. The application shows that the system takes the project as the management unit, deeply integrates multi-dimensional information such as progress, quality, safety, etc. in the construction process with the BIM model, realizes automatic collection and circulation of data during the construction process, and provides efficient management means for project construction.