1. The intensity and speed of recovery varies from patient to patient depending on their physique, body type, personality and type of surgery. It is best for people not to make analogies and should consult their primary care physician. 2.Ice packs: can be started immediately after surgery, 20-25 minutes each time, 4-6 times a day. If you usually feel swollen and hot joints, the number of ice packs can be increased appropriately. 3. Muscle strength training: (1) During hospitalization, the main exercises are ankle pump, quadriceps contraction, straight leg lift and side leg lift before discharge (at this time, muscle strength exercises are 5 minutes per hour, unlimited number of times); (2) After hospitalization, muscle exercises should be carried out in groups without obvious swelling and heat in the joints, with unlimited number of exercises in each group, until muscle soreness, rest for 6-8 seconds and then continue to exercise until (3) The improvement of muscle capacity is a key factor in joint stability, and the rehabilitation effect can be dynamically observed by measuring and comparing the 20 cm circumference of the thigh on the patella of both knees. 4, joint flexion and extension exercises: (1) can be started 3-5 days after surgery, according to the doctor’s recommendations, during hospitalization to 90 degrees is appropriate; (2) after discharge from the hospital, usually in the premise of ensuring that you can bend over 90 °, 1-2 times a day, and bending exercise before and after 20 minutes of ice; (3) usually bending angle in 6-8 weeks after surgery regression phenomenon, which is due to scar growth, at this time You should try to maintain the original slightly more than 90 degrees, such as more than 3 days can not exceed 90 °, should promptly consult the attending physician. 5. Pain: Pain in the anterior, medial and posterior lateral knee often occurs during functional exercises within 3 months after surgery. If the discomfort persists, you should reduce the amount and consult your doctor in charge in time. 6.About swelling: There will be different degrees of joint swelling throughout the exercise process, and the swelling will not gradually subside until the joint bending angle and muscle strength basically return to normal. However, persistent swelling or joint fever should be promptly consulted with the attending physician.