Cerebrovascular disease is a group of diseases in which lesions occur in the arteries of the brain or the carotid arteries innervating the brain, thus causing impaired intracranial blood circulation and damage to brain tissue. The main clinical manifestation is sudden fainting, unconsciousness, or accompanied by distorted mouth and eyes, unfavorable speech and hemiparesis. According to its course, cerebrovascular disease can be divided into two types: acute cerebrovascular disease and chronic cerebrovascular disease. Acute cerebrovascular diseases include transient ischemic attack, cerebral thrombosis, cerebral embolism, hypertensive encephalopathy, cerebral hemorrhage and subarachnoid hemorrhage, etc. Chronic cerebrovascular diseases include cerebral arteriosclerosis, cerebrovascular dementia, cerebral artery steal syndrome, Parkinson’s disease, etc. When we talk about cerebrovascular disease, we generally refer to acute cerebrovascular disease, which has an acute onset and is often life-threatening, therefore, it is also easy to attract people’s attention. Chronic cerebrovascular disease has a long course and is easy to be ignored. Cerebrovascular disease can be divided into two categories according to its nature, one is ischemic cerebrovascular disease, which is more common clinically, accounting for about 70%-80% of all cerebrovascular patients, due to cerebral arteriosclerosis and other reasons, so that the cerebral artery lumen narrowing, blood flow reduction or complete obstruction, cerebral blood circulation disorders, brain tissue damage and a series of symptoms. Another category is hemorrhagic cerebrovascular disease, mostly caused by long-term hypertension, congenital cerebrovascular malformation and other factors. Due to the rupture of blood vessels, blood overflows, compressing brain tissue and obstructing blood circulation, patients often show symptoms such as increased brain pressure and confusion. These patients account for about 20%-30% of cerebrovascular diseases. In addition, since the 1970s, due to the widespread use of CT and MRI, some cerebrovascular diseases in which hemorrhage and infarction coexist, i.e., mixed stroke, have been reported to account for 2.67% of hospitalizations for various cerebrovascular diseases in the same period. The etiology and pathogenesis are not fully understood, but hypertension and atherosclerosis are thought to be important causes, and are closely related to their severity.