With the continuous increase of the construction of domestic yacht wharf,more and more attention has been paid to the berthing conditions in the harbor.The main factors affecting the mooring stability of yacht wharf are the layout of breakwater,the structural type of breakwater,and structural form of revetment in the harbor.Based on the MIKE21-BW model,taking the planning and construction of yacht wharf on south Changshan Island in Changdao County as an example,mooring stability in harbor under two layout schemes of yacht wharf and six wave directions are simulated numerically.Comparing the wave heights at the entrance and the yacht berth in the harbor of two layout schemes,this paper analysis the factors affecting the stability of yacht berth in the harbor.The results show that the location of the breakwater,the structural form of the breakwater at the entrance and the structural form of the inland revetment have a direct impact on the berthing stability conditions of the yacht wharf.