Gui'an bonded area in Guizhou province is the second integrated free trade zone. The planning area is 2.2 km², with an seine area of 2.1 km². This project is a comprehensive service building in the free trade zone. BIM technology was carried out when the project started. This paper mainly introduces the application of BIM technology in the high support of the composite service building to solve the problems encountered in the implementation and demonstration of the original support scheme and to ensure the smooth, safe and punctual completion of the tall formwork for the entire project.