Abstract: Based on the application of BIM technology in the construction stage of an elevated expressway in a city as an example, this paper analyzes the characteristics and difficulties of such projects and proposes an optimization and improvement method for the traditional application of information model. Through the establishment of a standardized BIM collaborative management platform, the quality enhancement and efficiency improvement of technology and management in the whole process of the project can be realized simultaneously, and provide a model for upgrading the enterprise platform for multiple projects. The virtual space such as schedule and cost is constructed based on the platform application and the theory of digital twin. The virtual reality mapping relationship and how to feed back the actual work are analyzed, which promotes the construction standardization of such projects, improves the management efficiency, and realizes the application of digital twins technology, which can be used for similar projects.