Abstract: In order to improve the design level of the closed cutting and implement the digital management of the project, this paper carried out the research on the design of the railway closed cutting based on Building Information Modeling (BIM). The paper introduced the design process and method, the deepening design of railway closed cutting and tunnel bridge interface, the deepening design of reinforcement and comprehensive collision inspection. This design method has been applied in many railway projects. The application of this method effectively reduces the design blind area and the errors, omissions, collisions and defects between specialties, improves the design efficiency and quality, and can provide a reference for other railway closed cutting design projects.