Abstract: Optimization design models of VLCC principal dimensions should have advantages in the application both technically and economically,The Game Theory is the science of investigation and solution to optimize decision-making.Based on the similarities between optimization of ship principal dimensions and the Game Theory problems in economics,this paper sets the game players and their corresponding strategic options in ship design from the perspective of the Game Theory.The design goals are treated as game players and the design variables as each game player＇s strategies,thus the gaming method of the multi-objective optimal design is presented.The a application of the Game Theory to the practical optimization of ship design demonstrates that the cooperation-competition model is able to comprehensively reflect the requirement of each ship design and make the optimi zed result more reasonable.