The invention discloses an apple posture adjustment device which comprises a conveyer belt, wherein a plurality of partitions which are perpendicular to the conveying direction are arranged on the conveyer belt; the partitions are uniformly distributed to divide the conveyer belt into a plurality of barriers with uniform sizes; a plurality of small holes are uniformly distributed in one side of the conveyer belt; each partition is aligned to one small hole; a camera and a plurality of air cylinders which are uniformly distributed around the camera are arranged above the conveyer belt; rubber sleeves are arranged on air cylinder push rods of the air cylinders; each air cylinder is controlled by a corresponding electromagnetic valve; an image capture card and an I/O card are mounted in a computer; the camera is electrically connected with the image capture card; the computer is electrically connected with the electromagnetic valves and a control motor through the I/O card; the conveyer belt is driven by the control motor; a photoelectric sensor which is used for sensing the position of the conveyer belt is arranged on the side, provided with the small holes, of the conveyer belt; the photoelectric sensor is electrically connected with the I/O card in the computer. By using a digital image processing technology, the apple posture adjustment device is capable of automatically adjusting the apple postures online before peeling of the apples, and has the characteristics of being simple and convenient to operate and high in efficiency.