Cerebrovascular diseases are very common nowadays, and people are aware of the dangers of cerebrovascular diseases, not only the risk of disability, but also the high mortality rate, such as smog disease. It is characterized by narrowing or occlusion of the end of the internal carotid artery, followed by the appearance of an abnormal vascular network at the base of the brain, and is called smog because these new abnormal vascular networks resemble smoke. With smog, the cerebral vascular channels are narrowed or even occluded, so that the brain does not receive sufficient blood and nutrients, which causes a lot of physical discomfort. In clinical practice, there are two main types of smog, namely ischemic smog and hemorrhagic smog. Ischemic smog can cause transient cerebral ischemic symptoms in the early stages, and in severe cases, it can lead to cerebral infarction and hemiplegia, which greatly affects the quality of life of patients. In some cases, acute cerebral hemorrhage can occur, which can lead to disability and death if not treated in a timely manner. Therefore, patients should pay special attention to smog when it is diagnosed, as it is a chronic progressive disease that is mild in the early stages and can be treated early to reduce the damage. In the treatment of smog, medical experts have been researching and exploring, and have now reached a consensus that there is no specific drug for smog, and that the treatment is still in favor of surgery, mainly direct bypass, indirect bypass and combined vascular bypass surgery. However, from the analysis of past treatment cases, direct bypass and indirect bypass are still slightly single in treatment, and sometimes the recovery effect after surgery is not very ideal, so it is still more advantageous to combine vascular bypass surgery.