Combining with the design of the plane layout scheme of the breakwater of a central fishing port,in view of the problem that the anchoring conditions of the harbor pond cannot meet the corresponding wave height requirements,this paper calculates the wave height distribution of the water area in the port using the MIKE21 BW module.To improve the effective anchorage area in the harbor basin,the paper puts forward two kinds of optimal design schemes of breakwater,and determines the final optimization scheme of breakwater through calculation and comprehensive consideration of engineering cost,operation and maintenance.The results show that the methods of extending the breakwater and adjusting the angle of the entrance gate can effectively reduce the wave height in the port basin,thereby increaing the effective cover area of the port area and meeting the anchoring stability requirements of the anchorage.