After a patient is diagnosed with femoral head necrosis, the doctor will put the affected limb on weight restriction, bed rest, and surgical or non-surgical treatment. In the non-surgical treatment, it takes one to three years to repair a necrotic femoral head, or six months in the case of fast repair. However, long-term non-weight-bearing bed rest is not easy to implement and not advocated. Functional exercise can prevent disuse muscle atrophy and is an effective means to promote early recovery of function. Functional exercise should be mainly automatic, supplemented by passive, from small to large, from little to much, gradually increase, and according to the period of ischemic necrosis of the femoral head, shape, the degree of functional limitation of the soft tissues around the hip joint and physical fitness, choose the appropriate sitting, standing and lying exercise methods. 1.Sitting position: sit on a chair, hands on knees, feet shoulder-width apart, left leg to the left, right leg to the right while fully abducting and adducting. 300 times a day, divided into 3-4 times. 2.Standing leg lift method: hold the fixed object with your hands, keep your body upright, lift the affected leg so that your body is at right angles to your thighs and your thighs are at right angles to your calves, and repeat the action. 300 times a day, divided into 3-4 times. 3, lying leg lift method: supine, lift the affected leg, so that the large and small legs into a straight line, and the body into a constant angle, the action repeated. 100 times a day, in 3-4 times. 4, hold the squat method: hand holding a fixed object, the body upright, feet apart, squat and then stand up, the action repeated. Daily yoke, divided into 3-4 times. 5, internal rotation and abduction method: hand-holding fixed objects, the legs are doing full internal rotation, abduction, circle movement. 300 times a day, divided into 3-4. 6.Adhere to the training of walking with crutches or cycling exercise. Femoral head necrosis early, middle and late exercise principles to follow the principle of the combination of static and dynamic exercise. The principle of combining motion and static should be localized to limit movement, other parts of the body require movement, that is, to limit the local activities of the femoral head, so that the femoral head is not subject to body pressure, so that the whole body other joint muscle movement, to prevent the formation of various joint adhesions osteoarthritis and muscle atrophy. Early, middle and late stages of femoral head necrosis in the repair period must promptly remove the crutches walking, if not remove the crutches walking femoral head necrosis recovery speed instead of slowing down, greatly lengthening the whole process of treatment, wasting the patient’s valuable time and money, just start exercising each walking distance not too long, to feel slightly fatigue is appropriate, each day can walk more than a few times, in the exercise process they feel slightly fatigue If this is forced to continue walking exercise will travel hip pain symptoms, so it is very important that patients with osteonecrosis of the femoral head correctly grasp the exercise method and grasp the best time to exercise.