The building information model is based on the relevant information data of the construction project. Through the digital information simulation and Simulation of the real information of the building, through the 3D building model, the functions of engineering supervision, property management, equipment management, digital processing and engineering management are realized, which are suitable for the construction of the project. Each stage. It has eight characteristics: completeness of information, relevance of information, consistency of information, visualization, coordination, simulation, optimization and graphics.