For a better maneuvering performance to improve the market competitiveness, the method and process of rudder design and actual selection calculation are studied and discussed. The multiple rudder selection formulas are compared,and a complete set of rudder design process is formed while completing the hull research and development task: while referring to the advanced type information of the same type, combined with the requirements of the specification and the opinions of the pool, the rudder design parameters are finally determined. This design process can greatly improve work efficiency and quality, and support rapid development of new ship types.