Movements and positions that should be avoided within 2-3 months after surgery a Avoid pronation and avoid rolling over to the healthy side in the prone position. Postoperative bed position should be kept in an external position, put a T-shaped cushion or pillow between the two legs, and put a pillow on the outside of the affected limb to prevent external rotation of the hip joint. Avoid “crossing legs”, squatting, wearing shoes, sitting on a short bench and similar actions. c Avoid flexing the hip more than 90 degrees within 8 weeks. 1.1～3 days after surgery, you can do some exercise to move the joint muscle function. Methods: ① quadriceps static contraction training: patients lying flat on the bed, straighten the lower limbs, quadriceps static contraction; ② straight leg raising exercises: patients lying or sitting, toes up, tense the leg muscles, and then slowly straight leg raising, the height of the heel of the bed from the 20 cm is appropriate, remain suspended for 5-10 seconds; ③ ankle pump exercises: patients lying flat on the bed, muscle relaxation, straighten the knee, ankle at an even speed Do plantarflexion and dorsiflexion exercises. Start CPM machine exercise on the 2nd to 3rd postoperative day. The focus of functional exercise at this stage is to strengthen the active movement of the affected limbs in the non-weight-bearing state. Methods: ① Increase the range of motion of the affected knee joint by combining passive manipulative therapy and active activities, so that the affected knee joint flexes and extends the knee joint rhythmically; ② Practice standing and walking with the help of a walker; ③ Perform the seated knee flexion exercise: the patient sits in a chair, straightens the leg as much as possible and maintains it for 5 seconds, then flexes the knee as much as possible and maintains it for 5 seconds, and then repeats the exercise. 3.After the 15th day of postoperative period At this time, we should focus on helping the patient to gradually restore the weight-bearing capacity of the affected limbs, start walking and gait training, and strengthen the patient’s balance training, so that the affected limbs are gradually transitioned from partially weight-bearing to fully weight-bearing. During the home rehabilitation period, patients should continue to increase the range of motion of the affected limb and weight-bearing ability as well as self-care ability, and the amount of training should be appropriate in order not to cause discomfort in the injured limb. 7 weeks later, after the patient has adapted to it, he should get off the crutches.