Wave is the most important hydrodynamic factor in the construction of fishing harbors.Owing to the strong influence of offshore wind,it is necessary to build breakwater project.In this paper,the layout of breakwater is studied from the perspective of wave.Based on the analysis of the construction conditions of the Xiaoguoju Fishing Port,the paper discusses the standard of the wave protection and puts forward eight linear or folding layout schemes of the breakwater.In order to satisfy the effective berth area of the fishing boat,the MIKE21 BW module is used to calculate the wave height distribution and wave protection effect of the dam after the wave and water level combination under the condition of 50-year return period wave and water,and the eight schemes are studied.Based on the relative optimal scheme,two schemes are optimized.Ultimately we determine the optimal solution for a fishing port breakwater layout:breakwater total length is 350 m,folding dike angle is 132°,linear segment length is 122 m,and line length is 228 m.