Abstract: For the uncertain influence of complicated working conditions on the photovoltaic hydrogen production system performance,this paper puts forward a photovoltaic hydrogen production system model that takes into account the influence of multivariable factors and explores the effects of the light intensity,temperature,film thickness,pressure and other factors on the photovoltaic-proton exchange membrane（PEM）hydrogen production system. The PV hydrogen production model of solar cell-proton exchange membrane electrolyzer,which considers the solar irradiance,temperature,film thickness and pressure and other factors,is first established in the system. Then,the system is quantitatively calculated and qualitatively analyzed and is also experimentally verified based on the actual PV data. The results show that within the rated power range,the solar cell output current and power increase with light intensity and decrease with the temperature increase. In addition,the PEM electrolyzer voltage increases with light intensity,film thickness and pressure,and decreases with temperature. The trend of the solar cell output power and PEM electrolyzer voltage are consistent with the trends of the light intensity. At last,the calculation show that there are 16.8%,72.2% and 12.1% efficiencies for the solar cell system,the PEM electrolyzer system and the total system,respectively.