Patient radiotherapy auxiliary positioning device

The invention relates to the technical field of radiotherapy auxiliary equipment, in particular to a patient radiotherapy auxiliary positioning device which comprises a bottom plate, side plates are fixedly arranged on the two side walls of the bottom plate in the length direction of the bottom plate, and baffles are arranged at the two ends of the two side plates; a translation mechanism is arranged between the two baffles and located under the side plates, and strip-shaped through grooves are formed in the positions, located over the translation mechanism, of the side plates. A first U-shaped support is arranged on the side wall of the bottom plate in the width direction of the bottom plate, a servo motor is arranged on the side wall of the first U-shaped support, and a first bevel gear is arranged at the output end of the servo motor. Two transmission mechanisms are arranged between the first U-shaped support and the bottom plate, one end of each transmission mechanism is meshed with the first bevel gear,