Aiming at the damage problem of breakwater structure in open sea area caused by wind and wave,the reason of damage is analyzed and the suitable repairing and reinforcement scheme is selected.Based on the detailed data of wind,wave and current,especially considering the influence of several strong-super typhoons on the wind and wave in the engineering sea area in recent years,the main design parameters such as the top elevation of breakwater,the mass of protective face block and the cross-section structure pattern are determined by combining standard calculation with model test.At the same time,the layout of the breakwater is optimized from the point of view of the function of the breakwater and the berthing conditions in the harbor.Combining with the results of model test,this paper puts forward a more pertinent scheme of repairing and strengthening and optimizing layout,which has a certain reference significance for similar projects.