In view of the application of BIM technology in the design of reclamation projects,AUTODESK platform is adopted in the design of the Third Runway Project of Shenzhen Bao’an International Airport,which is based on the cloud-based collaborative platform and is able to combine different majors more closely,solving the problems in communication and coordination occurred in the traditional design.Besides,the three-dimensional geological model is established based on the geological data,and software Civil 3D is utilized in the detailed design of foundation trench and sea dike,which improves greatly the design efficiency and accuracy. This paper may serve as reference for promoting and appling BIM technology in the waterway engineering.