Smog is a rare cerebrovascular disease with the highest incidence in Asia worldwide. This disease is easily overlooked and misdiagnosed and missed in China because smog is not common in China, and the resulting lack of knowledge among health care professionals and few researchers of this type means that many patients with smog do not receive timely and effective treatment. If left untreated, some patients may suffer from memory loss, or even intracranial tumors, cerebral infarction, cerebral hemorrhage, and other very dangerous conditions. Therefore, not getting proper treatment can make the disability and death rate of smog disease higher, which seriously affects the life and quality of life of patients. In fact, the strength of the hospital is one aspect, the professionalism of the doctor is one aspect, and the choice of the surgical procedure is another equally important aspect. At present, there are three types of surgery for smoky disease, direct bypass, indirect bypass and combined vascular bypass surgery which combines both. Direct bypass surgery and indirect bypass surgery have their own drawbacks to a certain extent, but the world now recognizes that combined vascular bypass surgery is the most effective, so when patients are looking for a good hospital for the treatment of smog, they should take into account a variety of factors and choose the hospital carefully. Combined vascular bypass surgery is introduced through Japan, and has reached a fairly mature stage in China, and the results achieved in the clinic are also very good, and has been unanimously recognized by many experts and patients. According to the introduction, combined vascular bypass surgery is a combination of two traditional surgeries, on the basis of vascular bypass, more factors are applied to achieve a greater range of improvement of blood supply to the brain surface, and the effect of the surgery is maximized.