Arthroscopic technology has been developed for more than 40 years, and is widely used in the diagnosis and treatment of bone and joint diseases, and can be applied to many joints throughout the body, such as knee, shoulder, hip, ankle, elbow, wrist, etc. In 2008, more than 95,000 cases of arthroscopic surgery were completed nationwide, and in 2012, the number soared to more than 240,000 cases. The technical level is also gradually among the international advanced ranks. It can be used to treat all kinds of joint inflammation, knee cruciate ligament injury, knee lateral collateral ligament injury, meniscal injury, articular cartilage injury, gluteus contracture, ankle sprain, hip impingement, early femoral head necrosis, shoulder dislocation, shoulder impingement, rotator cuff injury, shoulder pelvis injury, etc. Compared with the traditional incision surgery, its advantages are: 1. Small incision, small skin scar, more beautiful. 2. Small surgical trauma and relatively safe surgery. 3. Quick recovery after surgery, most patients can be discharged 1 week after surgery. 4, the indications are wider, it is applicable to a variety of lesions in the joint; contraindications are less, such as poor physical conditions can not perform conventional incision surgery, but not necessarily contraindicated arthroscopic surgery.