The whole process of cost control in project construction are popular, but for various reasons in the actual implementation of how to become a mere formality. With the development of information technology, building information model and entered the practical stage in domestic has obtained the good effect on multiple projects, get the industry wide attention. In order to promote the whole process of cost control, should introduce the building information model in project construction management. Analysis of building information model in different role of the various stages of the whole process of cost control, the application of different forms of building information model and its difficulties, the whole process of construction project cost control of building information model application, implementation has reference value for the promotion of the whole process of cost control.