This paper discusses the digital application and benefit analysis of building information model (BIM) technology in the large-scale comprehensive development project of the Guangxi headquarters base. The project covers a total area of 92,100 square meters, with a total construction area of 379,700 square meters, including a variety of architectural forms. Through three-dimensional modeling and simulation analysis, BIM technology significantly enhances the design quality and efficiency, shortens the design cycle by about 20%, and promotes the collaboration and integration of project management, improving the management efficiency by about 25%. During the construction phase, the collision detection and four-dimensional visual management functions of BIM technology have improved construction efficiency by about 15% and saved the cost by about 10%. In addition, BIM technology has promoted green building and sustainable development, achieved the dual improvement of technical and economic indicators and social and economic benefits, set an example for enterprises in digital transformation, and opened up new market businesses.