Motor vehicle license plate automatic endorsement system

The invention is suitable for the technical field of motor vehicle license plate endorsement, and provides an automatic motor vehicle license plate endorsement system which comprises a conveying device, a temporary storage device, a mechanical arm and an endorsement device, a conveying belt is arranged on the conveying device, a plurality of lifting plates are arranged above the conveying belt, and a first alignment piece is arranged between each lifting plate and the conveying belt; an endorsement device is arranged on one side of the conveying device, an endorsement machine is arranged on the endorsement device, a pulley is arranged between the endorsement device and the conveying belt, a temporary storage device and a mechanical arm are arranged on one side of the endorsement device, an adjusting assembly is arranged in the temporary storage device, and a limiting rod is arranged at the top of the temporary storage device; and a PLC is arranged at the bottom of the mechanical arm, and a suction cup is arra