The invention discloses a high-temperature billet transport vehicle with an automatically opened and closed carriage door, and belongs to the technical field of special article transportation. The vehicle comprises a frame and wheels at the bottom, a bottom plate is arranged on the frame, a front carriage plate and a rear carriage plate are respectively arranged at the front end and the rear end of the frame; side carriage plates with the upper portions bent inwards are hinged to the two sides of the frame. At least two carriage plate connecting rods are hinged to the side carriage plates, frame connecting rods are hinged to the bottom ends of the carriage plate connecting rods, the other ends of the frame connecting rods are hinged to the bottom of the frame, telescopic oil cylinders arehinged to the ends, close to the carriage plate connecting rods, of the frame connecting rods, and oil cylinder supporting bases installed at the bottom of the frame are hinged to the other ends of the telescopic oil cylinders. The whole structure strength is high, the side carriage plates are balanced in stress, small in deformation in use, large in opening angle and large in operation space, thetelescopic oil cylinders are arranged at the bottom, the vehicle body is shorter, narrower and lighter, influence of the environment on a hydraulic system is small, influence of heat diffused upwardsin the carriage on the telescopic oil cylinders at the bottom is small, and the hydraulic system has a self-locking function, can be remotely controlled and is good in safety.