In addition to the routine postoperative treatment of infection prevention, hemostasis and dressing change, early and active functional exercise is particularly important. Within three days after surgery: 1. Observe the bleeding condition of the diseased area and the tightness of the elastic bandage. 2. (Prevent the bandage from being too tight to pressure injury). 2. Rest in bed in free position. 3. Minimize the activity of getting out of bed as much as possible, with the permission of walking with crutches without weight bearing to go to the toilet. The first postoperative day: Immediately after the operation, use a towel or restraining belt to tie both lower limbs together at the knee, and put a soft pillow under the knee. The lower limbs should be flexed at 15°~20° while the hips should be flexed at 60° (maintain the knee-binding at night until 3 weeks). If there is a drainage tube, observe the amount and nature of drainage fluid after surgery, and remove the tube on the 2nd postoperative day. Active muscle contraction exercise: take both lower limbs in the knee-extension position after surgery, after awake from anesthesia, then start the static contraction of quadriceps muscle, foot movement and gluteal muscle clenching exercise, each lasting for 5 seconds. 3 groups/day, 20 times/group. The second day after surgery: training methods: 1, passive double knee crossing exercises: the patient lying down. The assistant will help the patient to cross one side of the leg on the other side of the leg, with the knee as the crossing point, alternating between left and right, and repeat the exercise. This method can avoid gluteal muscle adhesion. It should be not less than 30~50 times a day. 2, passive double knee flexion exercises: patients lying down, assistants to help their legs together and bend the knee, and then instruct the patient to hold the knee with both hands. Try to make the thighs close to the chest for a few seconds and then flatten the legs and repeat. The purpose of this exercise is also to prevent adhesion of the gluteal muscles, not less than 30 times a day. Second, 4-5 days after the operation, hold the double crutches and walk indoor weight-bearing. During the day, you can practice hip joint adduction, i.e., the movement of thigh crossing to the opposite side. But the limit is to feel the pain that need to stop, the range can not be too large, otherwise it is easy to cause hematoma, prolong the recovery time. Passive squatting exercise: patients get out of bed, hold the end of the bed with both hands, squatting with knees together, the assistant standing behind the top of its back, ask the patient not to bend over as much as possible, the heels do not leave the ground, for 1~2min after standing up. Each exercise is repeated, the number of times can be gradual according to the condition. The number of times can be gradual according to the condition. It should be kept at 30~50 times a day. Third, 5-8 days after the operation, walking and hip flexion (sitting position) with the help of single crutch or going crutch. 1, gait training: encourage patients to get out of bed to practice walking, patients chest up, both upper limbs forward flat, assistants help patients with both hands, step on straight line bipedal cross walking, 3 times / day, each time along the 20-meter straight line back and forth walking, and adjust the patient’s posture at any time, so that it is coordinated. 2.”YiYi step” exercise: the assistant faces the patient, holds his hands and asks the patient to walk a word step (i.e., walk “cat” step), to correct the patient’s abnormal gait, not less than 300 steps per day. 3, knee squatting training: 5~7 days after surgery, instruct the patient to hold the railing and take the initiative to squat with the knees, the height of the railing to level the patient’s waist is appropriate, when practicing the feet and knees together, the heel does not leave the ground, the waist and back are straight, bending the knees to squat, squatting speed must be slow to prevent hip adduction and external rotation, 3 groups/day, 30 times/group, and gradually increase the practice intensity and time. Four, two weeks after the operation to remove the line, to encourage hip retraction (legs crossed), without crutches. 1.Cross your legs exercise: the assistant assists the patient to sit on a chair with a backrest, and the buttocks are close to the back of the chair. Upper body and thighs at right angles, one leg on the other leg, the knee for the cross, adhere to 3~5min and then change the other leg, repeat. Every day should be kept at 30~50 times. 2, hold the knee squatting: after the wound is removed from the line, instruct the patient to hold the knee with both hands squatting training. 3 groups / day, 20 times / group. At the same time, when standing, the two feet are separated before and after, the knee joint of the front lower limb is flexed, the knee joint of the back lower limb is straightened, both hands are pressed on the front knee joint, the body is leaning forward, hold on for 10s, and both legs are crossed. V. One month after the operation, instruct the patients to run and jump exercise, and follow up regularly, encourage and supervise the patients to insist on the above training for half a year to one year, in order to promote the recovery of hip joint function.