The principle of fracture treatment “reset, fixation, functional exercise”. Why is functional exercise considered so important? This is often a problem that many orthopedic patients and their families do not understand and are often not taken seriously. We know that the ultimate purpose of orthopedic trauma treatment work is to make the injured part maximize the possibility and restore the normal function as soon as possible. The measures of medical care are also centered on this purpose. No matter the rectification and fixation or surgical treatment, they are only the initial treatment work, even if the fracture is healed, it is still far from the functional recovery of the injured limb. In order to achieve this goal as soon as possible, it is necessary to carry out scientific and various forms of functional exercises under the medical staff to make the patient reduce complications, heal smoothly and resume work and life as soon as possible. Some people use “three points of treatment, seven points of exercise” to describe the functional exercise, it can be seen how important the functional exercise of orthopedic patients. So what is the significance of functional exercise? 1, promote swelling to prevent joint adhesions and stiffness: after the fracture, the soft tissues at the fracture have varying degrees of bleeding and edema, making the venous and lymphatic reflux is blocked, and thus there will be a lump in the injured limb, which, if not eliminated in time, can lead to the corresponding soft tissue adhesions and even hardening. Such adhesions can occur within the muscle and tendon, between the tendon and synovium, and within the joint, thus affecting the functional exercise of muscle contraction, promoting venous and lymphatic reflux, facilitating hematoma absorption, decreasing swelling, and reducing joint fluid exudation. This prevents joint stiffness caused by the joint itself and soft tissue adhesions. 2.Promote the healing of fracture The repeated stretching and contracting activities of the injured limb muscles can strengthen the longitudinal compression of the fracture, make the fracture gap smaller and the fracture part more stable, improve the nutrition of the fracture part, and enhance the bone capacity of the fracture end to promote the healing of the fracture. Functional exercises can also correct minor fracture misalignment, which is also beneficial to the healing of fracture. 3.Promote blood circulation Functional exercise can promote blood circulation and prevent thrombosis. Long-term bed-ridden patients, due to the lack of muscle stretching and contraction movement, blood circulation will slow down, so that the metabolism of tissues is reduced and the healing process of injuries is prolonged. Due to the damage of the traumatic bleeding wall itself, blood is easy to form blood clots, called “thrombus”, when it flows slowly in the damaged blood vessels. Small thrombus can dissolve by itself, if the thrombus is larger, it will come off from the blood vessel wall and enter the systemic circulation with the blood, which can cause infarction of heart, brain and lung important organs, and may cause sudden death of the patient in serious cases. 4.Reduce complications Frequent activity and exercise can prevent bone, joint and muscle complications, such as osteoporosis, delayed fracture healing, joint adhesion, joint capsule contracture, joint stiffness and muscle atrophy and other complications. In order for the patient to overcome the injury and recover the maximum function of the body, the best therapeutic effect can be achieved only by insisting on scientific functional exercises under the guidance of medical personnel.