1.Post-operative day 1-3 1.Patients mainly rest, heel and calf slightly padded; 2.Ankle to above the knee joint with light compression bandage, ice pack cold to reduce bleeding, eliminate swelling; 3.Passive exercises: (1) massage the affected limb from the foot and thigh, 20 minutes every 2 hours; (2) Chaperone hands on the affected knee, using the weight of the upper body to compress the affected knee joint, so that (3) flexion and extension of the ankle joint (alternating with lower limb massage), 20 minutes every 1 hour; (4) active exercises: (1) foot force to do up hook and step down action, each action lasts for 3 seconds, 5 times a day, 20 strokes each time, a total of 100 strokes; (2) flexion of the healthy knee, the affected knee is fully extended to do the pressure bed action, when the quadriceps muscle (2) The knee is flexed, the affected knee is fully extended and the bed is pressed, when the quadriceps muscle is contracted, the knee joint is flattened and the patella can be moved slightly up and down. Second, postoperative days 4 to 7 (increase the following exercises) 1, bed straight leg raising exercises, lifting 30 ° to ensure that the knee joint straight and back flattening, adhere to 5-7 seconds, repeat 30 times, 3 to 4 times a day. Pillow can help first, gradually reduce the height of the pillow. Avoid side lying abduction leg lift; 2.CPM machine – joint loosening exercise, 2 times a day. 3.With the help of the escort, sit on the bedside with bilateral calves naturally hanging down on the bedside, first actively extend the knee joint, extend to the maximum hold for 5-10 seconds, then flex the knee joint, flex to the maximum hold for 5-10 seconds, flex and extend 100 times a day. Third, the 8th to 14th day after surgery (increase the following exercises) Exercise on the ground: keep the upper body stable when walking, lift the affected thigh upward while bending the lower leg backward, avoid swaying the shoulder from side to side and cocking the hip; Fourth, rehabilitation exercises after discharge If the wound heals well and no serious surgical complications occur, the stitches are usually removed 14-20 days after surgery, at which time the patient’s physical condition has mostly recovered and can be discharged from the hospital. However, the knee function does not reach the ideal range, so the rehabilitation exercise should be insisted for three months after discharge.