(I) Staged rehabilitation 1. Preoperative rehabilitation Explain the operation to the patient before surgery, introduce the postoperative rehabilitation program, teach the patient to perform ankle pump contraction, quadriceps, N cord muscle, gluteal muscle isometric contraction movements, enhance the muscle strength training of the lower limbs and upper limbs. Train the position change and teach the patient to walk with a 3-point or 4-point gait with the help of crutches. Introduce postoperative movements and positions that should be avoided. Psychological guidance to eliminate the patient’s fear of surgery and the fear of rehabilitation. 2, postoperative rehabilitation (1) postoperative 2-3 months should be avoided movements and positions a. Adduction, postoperative hip adduction is easy to dislocate the artificial joint. Postoperative bed position should be kept in an external position, put a pillow between the two legs, and put a pillow on the outside of the affected limb to prevent external rotation of the hip joint. b. “Cross your legs”, squatting to put on shoes and similar actions. c. The affected hip is in the straight, internally retracted and externally rotated position, as in the lying position to the healthy side to turn over. d. Hip flexion greater than 90 degrees in 6-8 weeks. (2) Muscle strength training On the first postoperative day, ankle pump movement of the affected limb, quadriceps muscle, isometric contraction training of N cord muscle and gluteal muscle were carried out. Muscle strength training of both upper limbs and the healthy lower limbs should be started as early as possible and continued with respiratory training. On the 5th-6th postoperative day, we started knee extension training, adduction of the affected limb, and elevation of the hip, i.e., bridge exercise training. On the 7th postoperative day, start straight leg raising training, standing position N cord muscle open chain training. Resistance training of quadriceps, N cord muscle, and gluteal muscle was carried out gradually as appropriate. The muscle strength training should be carried out without pain, and the frequency and intensity of training should be increased according to the patient’s condition. (3) Joint mobility training The joints of both upper limbs and the healthy lower limbs were trained with active joint mobility 3-4 times a day. Passive joint mobility training of the affected hip starts on the 2nd-3rd day after surgery, and active knee flexion and hip and hip abduction training starts on the 5th-6th day after surgery. However, hip flexion should not be greater than 90 degrees, avoiding internal retraction, internal rotation and semi-flexion. (4) Weight-bearing and position transfer On the 2nd-3rd postoperative day, train the transfer from lying to sitting position. Postoperative day 5-6, transfer from bed to chair. Postoperative day 7, stand with two crutches, train to walk with two crutches or walker. Non-cemented type 20% weight bearing, gradually increased to 100% weight bearing after 6 weeks. The cemented type can be 100% weight-bearing; the mixed type can refer to the non-cemented weight-bearing according to the patient’s pain condition. Discharged 2 weeks after the operation, to achieve the affected limb muscle strength Ⅳ-V, the affected hip joint extension and flexion 00-900, the cemented group can walk with crutches and non-cemented group can walk with crutches and partially loaded, and the basic life is self-care. 3, post-discharge rehabilitation General hospital in the artificial hip joint 2 weeks after surgery, before discharge should be muscle strength, ROM, walking ability assessment. Teach the patient the family training program, including continuing to strengthen the muscle strength, joint mobility, joint proprioception, balance function and daily life ability training. The movements and positions to be avoided after surgery should be emphasized. In order to ensure the quality of rehabilitation, the patient should return to the hospital for rehabilitation therapy 1-2 times a week for 3 months after surgery. Three months after surgery, patients can take a walk, swim, dance, golf, but should avoid strenuous exercise. (II) Postoperative rehabilitation considerations The most important part of postoperative rehabilitation is the muscle strength training after artificial hip replacement. We emphasize that muscle training should be started as early as possible after artificial joint replacement. On the first day after surgery, full range of flexion and extension of the ankle joint of the affected limb, isometric contraction of quadriceps, N cord muscle and gluteal muscle should be started without pain. The cemented type can start 100% weight-bearing on the 7th day after surgery; the uncemented type can start 20% weight-bearing, and gradually increase to 100% weight-bearing after 6 weeks. According to the patient’s condition, the frequency and intensity of plyometric training and resistance plyometric training should be increased continuously. The patient’s hip muscle strength can be restored as soon as possible, and early muscle training can also promote blood circulation in the lower limbs and prevent deep vein thrombosis. Joint mobility training should be carried out when the pain is reduced after the surgery, and the movements and positions that are easy to dislocate the artificial joint should be avoided in the early stage of training. Artificial hip replacement due to the surgical approach, the type of artificial prosthesis and prosthesis fixation are different, coupled with the patient’s individual differences, the rehabilitation treatment must be different from person to person, the specific operation should be communicated with the surgeon, so as to carry out safe and effective rehabilitation treatment.