Precautions: The range of motion of the new joint is limited, and patients need to pay special attention to avoid joint dislocation, including: 1. Avoid external rotation of the hip joint (such as the action of stilting). 2, avoid deep squatting (e.g. avoid sitting on too short chairs; raise the toilet seat to keep the knee below the hip when toileting; avoid the action of bending down to pick up things). 3.Avoid crossing your legs when sitting, standing or lying down, hold a pillow between your legs when lying down, and keep your knees apart when seated. 4. When rising from a sitting position, slide toward the edge of the chair and then stand up with a walking frame or crutches for support. 1. 0-2 weeks postoperatively 1. Correct position placement: the affected limb in straight position, with a pillow under the leg to avoid inward movement of the hip (crossed legs, etc.)! Pillow between the legs when lying down, so that the legs can not come together. Do not turn over to the affected side! When turning to the healthy side, the affected leg should be protected so that the hip is kept slightly out of the booth during the whole movement! Put a high pillow between the legs after lying on the side, so that the affected leg can keep the hip slightly out of position! 2.Forceful, slow, full-range flexion and extension of the ankle joint, do more when awake. 3. Thigh muscle contraction exercise. 4.On the 3rd-5th day after surgery, you can sit up or walk on the ground under the protection of a walker, limited to movements such as going to the toilet, only 1-3 times a day. 2.After 3-4 weeks postoperatively 1.Joint mobility: knee flexion up to 120°, hip flexion close to 90°. 2.Muscle exercises such as straight leg lift in the prone position. 3.After 3 months postoperatively Gradually resume daily activities.