Abstract: The development and future trends of photovoltaic power generation in domestic and international urban rail transit are expounded. It is pointed out that ideal conditions for the installation of photovoltaic power generation system exist at locations such as elevated station,elevated section and vehicle base in urban rail transit. The key technologies of photovoltaic power generation system applied at those locations are analyzed. In addition, analytical research is conducted on key technologies including the integration types between the elevated station and photovoltaic power generation, the light pollution treatment and the system integration of photovoltaic power generation at elevated section,and the installation method of the photovoltaic power generation at vehicle base.