Abstract: The operation of high-speed railway needs a large amount of power supply. In order to alleviate the pressure of railway power grid and reduce energy consumption,a power generation system with photovoltaic modules above high-speed railway is proposed.Relevant calculations are carried out for the above systems to quantify the photovoltaic power generation potential of national high-speed railway lines with a design speed of more than 200 km/h. The results show that the annual PV power generation installed over high-speed railway lines in area of annual solar radiation greater than 1200 kWh/m~2is more than 7×10~4GWh,which closes to the annual power generation of the Three Gorges Dam,and can effectively alleviate the pressure on the railway power grid. When the train with a speed of350 km/h runs at full speed,the positive/negative value of the surface pressure distribution of the photovoltaic module at 4.5 m height is140 Pa/-225 Pa,and the extreme wind speed is 3.5 m/s,which meets the requirements of the maximum wind load limit of the photovoltaic modules. The energy conservation and emission reduction benefits on the photovoltaic system of the high-speed railway are significant,and the investment is economically feasible.