Adopting wave sectional physical model test and numeral model test coupling,we study the wave calculation method for the water area sheltered by the riprap submerged dike.The wave height of the water area sheltered by the submerged dike consists of the regeneration wave,diffracted wave from the entrance between submerged dikes and the wind wave of small fetch.The main factors are the structure of dike,wave feature and the length of the fetch.The calculation results of the numeral model are verified using the coupling model and according to the results of physical model test.Considering the overtopping wave height along the transmission attenuation,the energy consumption during the interaction of wave and structure,etc.,we calculate directly the design wave in front of the dike by adjusting the wave breaking index and parameters of wave energy dissipation.The results of the study are more realistic and thus provide a scientific basis for the engineering design.