In the light of the problems of complex and low efficiency in the process of engineering modeling, the paper proposed a three-dimensional modeling (3DM) method of water project based on the WorldWind.It designed the process of 3DM,established the three-dimensional digital earth platform based on the WorldWind,and realized the loading and. Management of model on the platform. Taking the Han-to-Wei River project for example,the paper established the visualization environment and developed the 3DM of reservoir,which was then integrated and displayed on the digital earth platform.The results show that the digital earth platform based on WorldWind has better scalability and visual functions. The method can efficiently achieve the three-dimensional visualization and simulation of the water project and has good application value and popularize prospect.