Arthroscopic surgery for synovitis is preferable and is a minimally invasive procedure with very small surgical wounds, but still does not achieve eradication of specific bone changes. The main benefit of knee arthroscopy surgery is that it is very minimally invasive, with very little damage to the soft tissues around the joint, and the knee arthroscopy procedure can address most of the diseases in the joint. Like ligament injury, meniscus injury, synovitis of the knee joint, etc., all of them can be solved by arthroscopic surgery, which can quickly remove the inflamed and swollen synovium, and achieve the purpose of rapid relief of symptoms. It is also less invasive and has considerable benefits for joint recovery. However, arthroscopic surgery is minimally invasive surgery, for patients with osteoarthritis requiring joint replacement, synovitis arthroscopic surgery can not be treated, the surgery, although very traumatic, but there will be a certain degree of trauma, if the patient does not actively carry out joint functional exercise after surgery, postoperative complications such as joint stiffness may occur. It should be noted that arthroscopic surgery is not recommended for patients with severe knee arthritis that is accompanied by severe knee deformity.