Abstract: Combining solar photovoltaic photothermal comprehensive utilization technology（PV/T）with proton exchange membrane electrolysis water electrolysis technology（PEMWE）,a PV/T-based on PEMWE system（PV/T-PEMWE）is proposed. PV/T module and PEM electrolyzer are integrated through coupling,a mathematical model is established to analyze the dynamic photoelectric photothermal performance and hydrogen production performance of the system during the day,and its performance is compared with photovoltaic electrolytic hydrogen production system（PV-PEMWE）under the same conditions. The results show that the total power generation of the PV/T system is 0.5 kWh throughout the day,the electrical efficiency is maintained at 13%-15%,the total calorific value is 9.4 MJ,the thermal efficiency is maintained at 30%-40%. The hydrogen production efficiency of PV/T-PEMWE system is higher than that of PV-PEMWE system. The PV/T-PEMWE system can produce 153 L of hydrogen throughout the day,and the average hydrogen production rate is about 19 L/h.