In order to solve the problems of high energy consumption and poor fuel economy of traditional ship in sailing process,a new type of ship drive system layout scheme,namely introducing continuously variable transmission system between the engine and gearbox device of ship is presented.Then work principle of the new ship continuously variable transmission system is introduced and the mathematical model is established.Finally,according to the actual cycle condition to verify the design.The simulation results show that the layout scheme of new type of marine ship power system based on continuously variable transmission system and the way of realization has certain feasibility,the design can make the actual transfer dynamics parameter and the theory of demand values tend to be consistent,the better to achieve the purpose of energy saving.