During arthroscopic surgery, a large amount of joint lavage is required, and there is a period of edema in the short-term postoperative period; 1. Avoid weight-bearing for 2 weeks after meniscectomy; 2. Perform joint mobility training as early as possible; 3. 1. Straight leg raise training: 30 times for one group, 10 groups per day; 2. Ankle pump training: 10 times for ankle pump after straight leg raise; 3. The second day to two weeks after surgery: 1, avoid weight-bearing; 2, muscle strength and joint mobility training; 3, sodium hyaluronate joint cavity injection, 1 injection per week; 4, but for meniscus repair patients should be fixed in a cast for 6 weeks. Avoid weight-bearing for 6 weeks; 5. Start weight-bearing and joint mobility training after 6 weeks.