Abstract: As a product of the combination of engineering and information technology, BIM played a crucial supporting role while promoting the life-cycle information flow of engineering, improving the quality of project construction and management, reducing overall cost of construction and operation process, etc.The current BIM technology is mainly applied building projects, and the application in water conservancy and hydropower projects is less.We use BIM technology in the design of the largest sedimentation basin of the world in CCS project.Thought the careful BIM organization and a series of BIM technology applications, such as special-shaped structure BIM design, BIM application of terrain and geology, BIM application of reinforced bar, BIM-based digital archives, etc., we completed the design and management works in the design and construction stage.This paper focuses on the construction and application of the whole project in the organization and application environment, BIM application and its effect, and presents a feasibility plan for the future application of BIM in hydropower station.