This paper takes a project in Guigang as an example, and discusses the value of applying the BIM-based green construction technology in large-scale projects. Detailed analysis is conducted on the application of BIM technology in energy saving, land saving, material saving and environmental protection in green construction, and also thefeasibility of BIM application in water saving is discussed. Considering the actual situation of the project, the implementation effect and obstacles in application are analyzed in this paper, and the follow-up exploration direction of BIM in green construction is put forward. The BIM-based green construction technology is of great significance to realize the goal of 4S1P (Energy Saving, Land Saving, Water Saving, Material Saving and Environmental Protection) in green construction, as well as to save the project cost and to improve the benefit.