Minimally invasive concept in the history of medicine, can be traced back to the ancient Greek Hippocrates, the philosopher physician two thousand years ago, said that medical treatment must minimize trauma, otherwise the damage caused by the treatment may be more serious than the pain caused by the disease itself, the second half of the 20th century, after the continuous exploration of the surgeon to achieve the perfect treatment effect, a change in the traditional way of surgery, the formation of a new surgical procedures of clinical medicine Mode —— minimally invasive surgery, such as the clinical application of various endoscopes, interventional therapy and surgical navigation techniques have emerged, minimally invasive surgery reduces the pain of the patient’s treatment and reduces the medical complications of traditional surgery. Endoscopic system is mainly composed of endoscope, endoscopic TV camera system, cold light source system, carbon dioxide pneumoperitoneum system, high-frequency electrosurgical knife, flushing, suction device and other various devices. It is connected by the camera head and the endoscopic eyepiece, and the endoscopic image is converted into a color video signal by electrical signal input, and output to the monitor, and the doctor can observe and carry out various surgical treatments through the monitor. Arthroscopy is only one of the endoscopes in the family, the application of arthroscopy technology can directly observe the lesions in the joints, and discover the pathological changes that cannot be observed by other examination methods, which can indicate the degree and scope of various lesions in the tissues in the joints and the feasibility of biopsy of the tissues in the joints, which improves the diagnostic level of the joints diseases, and helps the clinicians to confirm the diagnosis of the cases that the diagnosis is not clear. Arthroscopy and surgical indications are: ① meniscus total or partial excision; ② free removal of joints; ③ articular cartilage repair; ④ meniscus edge damage suture; ⑤ joint adhesion band release or excision; ⑥ synovectomy; ⑦ cruciate ligament plasty; ⑧ treatment of septic arthritis; ⑨ resection of intra-articular tumors; ⑩ other diagnostic methods can not be sure of the nature and scope of the lesion, such as cartilage injuries, synovial lesions, ligament injuries, the diagnosis is not clear, but it can help clinicians to confirm some cases of unclear diagnosis. Lesions, ligament injuries, check the indications: young people with knee pain and can not locate or determine the presence or absence of lesions, the patient’s complaints and signs of contradiction or signs of fewer people who have had more than one operation and still have symptoms. Arthroscopic surgery is characterized by ① small incision, ligaments around the joint cavity, the joint capsule and cutaneous nerves from being cut off; ② joint damage interference is small, the patient’s pain is small, fast postoperative recovery, postoperative 2 & mdash; 3 days to get up and move around, after the operation can be discharged from the hospital for 7 days; ③ observation is clear, you can clearly observe a variety of intra-articular structures; ④ incision is flexible; ⑤ the threat of contagious diseases is small, arthroscopic It is especially suitable for the treatment of intra-knee disorders in athletes, so arthroscopy and surgery have become an important examination and treatment means for joint diseases.