Shoulder amputation prosthesis is suitable for amputees with shoulder amputation, upper limb amputation (scapula and clavicle amputation) and upper arm amputation, and the length of residual limb is less than 30% (usually less than 10cm acromion). Because the patient's whole upper limb function is lost, it is difficult to control the mechanical prosthetic hand by pulling the traction rope with the movement of the shoulder, so the electric hand or decorative hand is usually assembled.