Abstract: To address the applicability of PEMFC to ships,a three-dimensional single-flow channel PEMFC computational model under simple harmonic vibration of ship hull is established. The dynamic performance of PEMFC under simple harmonic vibration of ship hull is simulated and studied by computational fluid dynamics as the main research method. The results show that the PEMFC under simple harmonic vibration has a periodic output pattern after the initial stage response;the hull vibration will significantly affect the heat and mass transfer of the internal components of the PEMFC,resulting in the failure of the electrochemical reaction to proceed normally and the decay of the PEMFC performance. Hull vibration even causes the battery starvation phenomenon. When the amplitude is constant,the increase of the vibration frequency will intensify the phenomenon of battery starvation.