Safety protection system of electric vehicle

The utility model discloses a safety protection system of an electric vehicle. The safety protection system comprises a vehicle-mounted motor controller. A gear switch of the vehicle-mounted motor controller and a vehicle-mounted power supply manual switch circuit are connected with a charging protective relay normally-closed contact, a gear power supply relay normally-opened contact and a parking brake relay normally-closed contact in series. A gear power supply relay coil and a parking brake relay coil are connected in series and then are connected with a parallel branch formed by a vehicle-mounted parking brake switch and a vehicle-mounted brake oil level switch in series. The gear power supply relay coil is electrically connected with a series connection contact of the parking brake relay coil and a vehicle-mounted key switch starting position contact. The charging protective relay coil is electrically connected with a vehicle-mounted charger alternating current power supply socket. The safety protection