Abstract: In order to improve the wave energy conversion efficiency of a given sea sample machine,a combined control strategy is proposed,in which the mountain climbing method is used to determine the optimal reference current,and the model predictive control algorithm is used to determine the switch off of MOSFET The switch follows the optimal reference current. When the wave height decreases,the direction of disturbance will be judged wrong when the hill-climbing method is used to determine the optimal reference current,so the judgment of average power reduction threshold is added. The simulation results show that the improved hill-climbing method can correctly determine the disturbance direction whether the wave height rises or falls,and can adaptively adjust the equivalent load of the boost circuit with any change of the wave height to achieve the maximum power output of the MHD wave generator. Finally,the hardware circuit is built to simulate the MHD wave generator with DC voltage source,and the effectiveness of the control strategy is verified by experiments.