BIM technology is adopted for design. Firstly, three-dimensional model can be used to analyze, compare and study the overall design scheme, so as to ensure the rationality of the design scheme. In order to effectively improve design efficiency and reduce design errors, all professional designers optimize design and construction schemes on a unified model platform. Secondly, with the support of 3D model, it can communicate with all parties of the building more intuitively, understand the design intention easily, and reduce the possibility of scheme change and design modification. Finally, the 3d model of the scheme can be applied to the construction, operation, management and maintenance stages to maximize the utilization of the design results.