Abstract: For modeling the optimum propulsion system of glidinghydrofoil craft,a mathematic model was established in the software MATLAB by applying the weighting factors of rapidity and economical efficiency.And corresponding simulation analysis was performed on SIMULINK.The improved chaos optimum algorithm was adopted to optimize the fuzzy control system for obtaining minimum desired value.The rotate speed of prime（RMP） engine and pitcch of APP propeller were optimized,realizing optimum control of fuzzy controller over the RMP of prime engine and the pitch of APP propeller at various operating conditions.The optimized controller via an improved algorithm is compared with conventional controller.The results show that the optimized controller of propulsion system is valid,which allows small overshoots in speed control and also presents a good stability.