Abstract: The Tian Tan Hospital project, constructed by China Construction First Building ( Group) Co., Ltd. , is the largest hospital under construction in Beijing. From the very beginning, the project pays much attention to the application of BIM technology in basic construction technology guidance as well as in the project management. The application of BIM tec hnology lays a solid foundation for the success of the project. This article presents a detailed introduction to how BIM technology is applied in the project.