Arthroscopic surgery, also known as “key surgery or minimally invasive surgery”, is a major advancement in modern surgery and the future direction of surgery. Compared with traditional open surgery, it has the following advantages: 1. truly minimally invasive surgery, with a small incision of 0.4cm, small postoperative scars, and meets the aesthetic requirements; 2. clearer diagnosis, more delicate surgery, high safety, and significantly better surgical results than traditional incision; 3. less tissue damage, fast recovery after surgery, usually the next day can walk and live on their own; 4. short hospitalization time, an average of 2 to 4 days, can also be discharged within 24 hours; 5. 5.The total medical cost is reduced, and the patient is satisfied and the doctor is satisfied.