Fuel cell power supply circuit

The invention relates to power supply equipment for an electric power locomotive and particularly to a fuel cell power supply circuit. The fuel cell power supply circuit comprises a fuel cell battery; the anode and cathode of the fuel cell battery are respectively connected with a first power supply connector XS1 and a second power supply connector XS2; the first power supply connector XS1 is connected with the anode of a first crystal diode D1; and the cathode of the first crystal diode D1 is successively series connected with a DC contactor KM and an air breaker QF and then is connected with the anode of a second crystal diode D2. The fuel cell power supply circuit has the advantages of sound design and simple structure, thereby being well applied to a new energy fuel cell light rail vehicle.