Abstract: The model of the membrane established with the multi-physical field simulation tool is simulated and optimized to achieve the optimal design of the membrane of electromagnetic acoustic shock wave generator. A greater amplitude of the membrane is obtained by operating in the fundamental frequency when compared to the higher eigen frequencies. A concept of the maximum deformation point is proposed and used in analyzing the conversion efficiency under different excitation and determining the parameters of the excitation circuit in order to get efficient output;and then the performances of three type of membrane are compared and discussed based on the simulation results, the conclusion is obtained that the corrugated membrane has a larger amplitude under the same excitation. The work of this paper has certain reference value for the development of high efficiency and high power electromagnetic acoustic shock wave generator.