The rehabilitation exercise program is different for different parts of the body after fracture. After surgical internal fixation or external fixation of the fracture of the limb, the pain and other symptoms will gradually disappear, and then the fracture healing period of several months will enter, during which the focus on rehabilitation exercises can accelerate the healing of bone and soft tissue, shorten the course of the disease, promote the recovery of joint motor function and early return to work. Although the methods and precautions for rehabilitation exercises after fracture differ from site to site, the common points are: 1. CPM machine training: continuous passive movement of the joints assisted by machines, and testing the degree of safe joint movement under direct vision during surgery (after fracture fixation) to determine the degree of postoperative CPM machine exercises. This step is especially important for fractures involving joints. 2. Unfixed joints: isotonic motion training, i.e. uniform forceful muscle contraction to make the joint move at a uniform rate. 3.Fixed joint: isometric contraction training of the surrounding muscles, i.e. muscle contraction and tension increase, but the joint does not produce motion. 4.No-load activity of the joint: for fractures involving the joint surface, after 3~4 weeks of fixation, if the fracture is stable, the external fixation can be temporarily removed and active movement of the joint without load (no weight on the lower limb and no object on the upper limb) can be done to restore the function of the joint as early as possible. 5. Healthy limb: daily training is needed to promote the improvement of cardiopulmonary and other systemic functions. Points to note: 1. Painless principle: Any functional exercise must ensure that there is no pain at the fracture, otherwise it is excessive exercise, which can easily displace the fracture and make the fixation fail. 2, self-control, gradual: functional exercise after the fracture is the patient’s own initiative to exercise, need to be gradual, persistent, not the luxury of “one step” and let others to break your joints, that is very dangerous, it is easy to break the fracture just healed. 3, to avoid increasing the adverse stress: functional exercise can not increase the fracture end of the rotation, shear, angular and other adverse stress, such as the upper limb humerus fracture internal fixation can not be done after lifting off the action, because the sleeve with the forearm rotation will produce shear stress in the fracture end of the screw loosening, dislodgement and other complications, so the functional exercise control of rotation is very important. 4.Who can give you safe and correct guidance: Only the attending surgeon knows the extent of your fracture fixation, so that he can correctly guide you to grasp the strength of the exercise and carry out both safe and active functional exercise; 5.Key parts: the knee, shoulder, elbow and metacarpophalangeal joints are easy to stiffen and need special attention, while the principle of hip exercise is “early activity, late Weight-bearing”.