I. Pre-operative exercise Pre-operative bedside stool and urine exercises; crutches exercises; gluteus medius strength exercises. 2. 1-10 days after surgery: bed rest and stabilization Bed rest, bilateral hip abduction 15°～20°, ankle pump exercises, quadriceps functional exercises, passive hip flexion 0°～40°, semi-recumbent 0°～40°, bilateral upper limb functional exercises, cardiopulmonary and gastrointestinal functional exercises, urinary and fecal care, decubitus ulcer care, cast care; avoid active movement of the hip joint on the operated side; prevent cardiopulmonary, urinary and gastrointestinal complications, maintain vital signs smoothly and tide over the early postoperative risks. Third, 10 days to 3 weeks after surgery: go down to the ground (discharge), release the abduction fixation of both hips, continue ankle pump exercises, quadriceps functional exercises, passive hip flexion 0°～40°, passive internal abduction and adduction of hip -15°～30°, passive internal rotation and external rotation of hip -15°～15°, can flex the hip 60° and sit at the bedside; can go down to the ground with crutches, no weight-bearing activities of the affected limb; active forward leg lift in standing position 30° and Continue functional exercises of both upper limbs, cardiopulmonary and gastrointestinal exercises, urinary and bowel care; prevent cardiopulmonary, urinary and gastrointestinal complications and maintain stable vital signs; avoid prolonged bed rest to move to the floor. Fourth, 3 weeks to 6 weeks after surgery: joint mobility (6 weeks review) Increase the number of daily activities and degree of exercise on the ground; if the joint is very stiff / or joint mobility is very poor, it is recommended to rehabilitate in the hospital or rehabilitation center for a week; continue to go down on crutches, no weight-bearing activities of the affected limb; active forward leg lift 30° and back extension 10° in standing position gradually increase hip flexion mobility to 90°, hip flexion 90° end sitting; passive Exercise hip extension-15°～90°, internal abduction-15°～30°, internal rotation-external rotation-15°～30°. 5. 6-12 weeks after surgery: slight partial weight-bearing (review at 12 weeks) Continue to go down on crutches, partial weight-bearing activities of the affected limb, no more than 1/4 of body weight; avoid straight leg elevation in bed, avoid lateral leg elevation exercises in side lying; lower limb strength exercises in standing position, active leg elevation 30° forward, 10° backward extension, lateral leg elevation; add sandbags if necessary; continue to increase hip mobility, passive exercises of hip extension-15°～90 °, internal abduction – 15° to 30°, internal rotation and external rotation – 15° to 50°, If the joint is very stiff / or joint mobility is very poor, it is recommended to rehabilitate in hospital or rehabilitation center for one week. 6. 12 weeks to 24 weeks after surgery: partial weight-bearing (review at 24 weeks): single or double crutches on the floor, partial weight-bearing activities of the affected limb, no more than 1/2 of body weight; crutches on the non-surgical side, cane on the surgical side; increase active strength exercises of the lower limbs, maintain normal mobility of the hip joint; gait exercises; according to the review, increase bedside straight leg raising and lateral leg raising exercises; increase non-weight-bearing bicycle exercises, swimming exercises, If the mobility of the joint is poor or the strength of the hip joint and lower limb muscles is very poor, it is recommended to rehabilitate in hospital or rehabilitation center for one week; continue to increase the mobility of the hip joint and achieve complete self-care: going to the bathroom, washing, putting on shoes and socks. Seven, more than 6 months after surgery Abandon the crutches according to the review of the film; most patients need to continue the single crutch or cane protection for 2-3 months; strengthen joint mobility exercise, hip and lower limb muscle strength exercise, normal gait exercise; elastic band exercise; specific movements are: flat lying straight leg lift, side lying side leg lift, single leg stand on the side of the operation, normal gait exercise, squatting, cross-legged exercise; can moderately do yoga exercise. If the mobility of the joint is poor, or the muscle strength of the hip joint and lower limbs is very poor, or if the limp is severe, it is recommended to spend a week in the hospital or rehabilitation center for rehabilitation; general requirements: within 3 months after surgery, maintain the stability of the joint and achieve near-normal mobility (avoid excessive exercise); 3-6 months after surgery, mainly maintain the mobility of the hip joint and strengthen muscle strength exercise (avoid re-adhesion/avoid early wear and tear of the joint); 6-9 months after surgery, recover from surgery; Return to normal gait and normal school work life 6-9 months after surgery, a few weeks earlier for patients under 15 years old and a few weeks later for patients over 15 years old. Even if recovery is good after surgery, avoid strenuous exercise and heavy work for 3-5 years to avoid early wear of new joints. Goal: to achieve normal gait, normal joint mobility, complete self-care without assistive devices, return to school work, and integration into normal social life.