At present, most of the hip arthroplasties are cemented and can be weight-bearing 24 hours after surgery, but in the early stage and the initial stage, the training is still mainly static exercises (no movement of the joint, maintaining a certain posture until muscle fatigue). Attention should be paid to avoid hip inversion (crossed legs, etc.). Pillow between the legs when lying down, so that the legs are not together. Do not turn over to the affected side. When turning to the healthy side, the affected leg should be protected, so that it can keep the hip slightly out of the booth during the whole movement. After lying on the side, put a high pillow between the legs to keep the affected leg in a slightly outward position of the hip, and do not walk too much. 1.0～2 weeks after surgery (1)Place the affected leg in the straight position after surgery, and use a pillow under the leg to elevate the affected leg to prevent swelling. (2) After the anesthesia subsides, start to move the toes and ankle joint, as well as ankle pump exercises: 5 minutes/group, 1 group/hour. This exercise is important for preventing swelling and deep vein thrombosis and promoting blood circulation in the affected limb, and should be practiced carefully. (3) Isometric contraction exercises for quadriceps and N cord muscles: >300 times/day. Should be done as much as possible without increasing pain. (4) CPM exercises should be started 3 days after surgery, 2 times/day, 30 minutes/time, with ice immediately after the exercises for 30 minutes (angle gradually increased without or with slight pain), and completed under the guidance of medical staff. Keep the hip slightly out of the booth during the whole exercise. (5) Prone position “leg hook exercise”: 10 times / group, 10-15 seconds / time, each interval of 5 seconds, 4-6 groups of consecutive exercises, 30 seconds rest between groups. (6) Active joint flexion and extension exercises: 10-20 times/group. If the healing is good, strive to reach 120° of knee flexion and 90° of hip flexion in about 6-8 weeks, and gradually increase. (7) Weight-bearing and balance exercises: must be carried out after X-ray examination and under the condition that the degree of fracture healing allows. With the degree of fracture healing, weight-bearing gradually transitions from 1/4 weight → 1/3 weight → 1/2 weight → 2/3 weight → 4/5 weight → 100% weight. The affected leg can be weighted on a flat scale to clarify the sensation of partial weight bearing. Gradually, the affected side can reach full weight-bearing standing on one leg. 5 minutes/time, 2 times/day. 2.3～4 weeks after surgery (1)You can start fixed bicycle exercises with light load to heavy load and gradually reduce the height of the seat. 20～30 minutes/time, 2 times/day. (2) Resistance knee extension exercises: 10 times/group, 10-15 seconds/time, 5 seconds interval each time, 4-6 groups of continuous exercises, 30 seconds rest between groups. (3) Heel lifting exercises: 2 minutes/time, 5 seconds rest, 3 to 5 times/group, 2 to 3 groups/day. 3, 1 to 3 months after surgery (1) static squat exercises: gradually increase the angle of squatting (less than 90 °) with the increase in strength, 2 minutes / time, interval 5 seconds, 5 to 10 sets of continuous exercises, 2 to 3 sets / day. (2) straddle exercises: including front-to-back and lateral straddle exercises, 20 times/group, 45 seconds rest between groups, 4-6 groups of continuous exercises, 2-4 times/day. (3) Single-leg squat exercises on the affected side: slow, hard and controlled (no shaking). 20-30 times/group, 30 seconds interval between groups, 2-4 times/day.