The design of flood control for revetment of the first nuclear power plant built on an island in China is studied and a scheme of vertical revetment structure is proposed in order for the plant to meet the requirements of flood control and to separate from the adjacent islands. A series of wave physical model tests are carried out based on the results of wave numerical simulation, and the wave overtopping and structural stability of the revetment are verified and optimized. The results show that in the case of island topography, the wave wall should be raised and its structural type should be optimized because the wave height at the slope foot of the revetment rises due to wave breakage and wave energy concentration. Under the same standard of wave overtopping, the elevation of the wave wall of the vertical revetment structure should be increased obviously compared with that of the slope dike structure. When using some island terrain slope highlands as parts of the revetment in the plant area, the elevation of the wave walls of the adjacent revetments must be increased because the wave climbing effect is obvious at the slope highlands of undisturbed island terrain.