1.Post-operative day 1~week 2: Avoid standing and walking for a long time, avoid heat therapy, and apply ice after surgery Day of surgery: After the anesthesia subsides, start moving the toes and ankle joint. (1) Ankle pump – forceful, slow, full range of flexion and extension of the ankle joint. (2) Thigh muscle contraction exercises – i.e. thigh muscle tensing and relaxation. Do as many as possible without increasing pain. Zheng Peng, Department of Orthopedic Surgery, Fushun Central Hospital (3) After 24 hours postoperatively, you can walk on the ground with the help of crutches, but only for necessary activities such as going to the toilet. Starting from the 2nd postoperative day: Continue the above exercises. (1) Start straight leg lift: straight leg lift after knee extension until the heel is about 30M from the bed, hold for 5 seconds. 30 times/group, 3-4 groups/day. (2) You can walk with partial weight bearing under the protection of brace (don’t need cast fixation). 2.Weeks 3~5 after surgery: (1) Continue to strengthen the above exercises. (2) Mobility exercises, passive flexion and extension (0~60 degrees), 1~2 times a day. Apply ice for 10-15 minutes immediately after the mobility exercises. (3) No more than 90 degrees of flexion is allowed for 4 weeks. (4) Perform daily medial pushing exercises on the patella. (5) Starting from the 3rd week after surgery (after stitch removal), the patient is allowed to remove the brace in the shower. However, during the 6 weeks after surgery, the brace is required to be worn during walking and sleeping. 3.6 weeks~3 months after surgery: (1) Continue and strengthen the above exercises. (2) Gradually put on full weight and walk with normal gait. 4.After 3 months postoperatively: Jogging and light physical activities are allowed to start. When starting to resume sports activities, patients can wear simple knee pads and patella stabilization brace for protection. The return to normal knee flexion and extension range of motion and quadriceps muscle strength allows for complete physical activity, which generally takes 6 months.