The utility model relates to an independent photovoltaic power generation railway power supply control system. In railway electric equipment, there are a large impact load, a communication signal high stability load and other equipment with a special electric demand. Solar photovoltaic power generation is greatly influenced by an environment. In a photovoltaic power generation system, problems that solar energy conversion efficiency is low and power supply system power is insufficient generally exist. The system collects sun radiation energy and converts into direct-current electric energy. After conversion, charging is performed on a storage battery. A direct current is converted into an alternating current so that a load can use the alternating current. Load working voltage current information monitored by a working state collector and environment information monitored by an environment illumination collector and an environment temperature collector are transmitted to an energy storage system controller. After logic processing, control to a charging conversion module and an inversion conversion module is performed. According to a railway load operation state and an environment state, continuous and smooth electric energy is adjusted, controlled and output; photovoltaic power generation power quality and efficiency are increased and continuous stability of power supply transmission is guaranteed.