The utility model discloses a track traffic high-voltage electrical cabinet and a vehicle chassis. The track traffic high-voltage electrical cabinet comprises a cabinet body, the cabinet body comprises two high-voltage device cavities, the high-voltage device cavities are connected through crossbeams, and inner sides of the crossbeams are provided with wiring grooves; and the length direction of the cabinet body is perpendicular to a vehicle driving direction. The high-voltage electrical cabinet is simple in structure, perform wiring through the middle crossbeams, and is beautiful and practical; the high-voltage electrical cabinet is transversely arranged under the vehicle chassis, wiring of the middle wiring grooves of a vehicle is convenient, and a vehicle bottom space is also greatly saved; and the track traffic high-voltage electrical cabinet is easy to detach, convenient to maintain and high in reliability.