Cerebrovascular diseases can be divided into two types of acute cerebrovascular diseases (stroke) and chronic cerebrovascular diseases according to their processes. Acute cerebrovascular diseases include transient ischemic attack, cerebral thrombosis, cerebral embolism, hypertensive encephalopathy, cerebral hemorrhage and subarachnoid hemorrhage, etc.; chronic cerebrovascular diseases include cerebral atherosclerosis, cerebrovascular dementia, cerebral artery steal syndrome, multiple lacunar infarcts, etc. What we usually call cerebrovascular disease generally refers to acute cerebrovascular disease. It is characterized by rapid onset, often endangering people’s lives, and therefore, it is also easy to attract people’s attention. Chronic cerebrovascular disease, on the other hand, is easy to be ignored due to its long course. 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% to 80% of all cerebrovascular patients, due to cerebral arteriosclerosis and other reasons, narrowing of cerebral artery lumen, reduced blood flow or complete obstruction, impaired blood circulation in the brain, 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% to 30% of cerebrovascular diseases. In addition, since the 1970s, due to the widespread use of CT and MRI, some cerebrovascular diseases with coexisting hemorrhage and infarction, 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 considered to be important causes and are closely related to their severity. Cerebrovascular disease is one of the three major diseases that cause human death and kills 4.6 million people per year globally, with 1/3 of them in industrialized countries and the rest occurring in developing countries, with illness and death mainly in people over 65 years of age. Japan has one of the highest incidence and mortality rates of stroke, and cerebrovascular disease mortality has been the leading cause of death. China is also a region with a high incidence of stroke mortality, and it is estimated that 6 million residents now suffer from cerebrovascular disease, with 1.3 million new cases and nearly 1 million deaths per year. About 3/4 of the survivors are left with sequelae such as hemiplegia, and some patients lose their ability to work and live. According to domestic and foreign epidemiological surveys, cerebrovascular disease is a class of common diseases that seriously threaten human health and life expectancy. According to the statistical data of Beijing in 1994, the incidence of cerebrovascular disease ranks first. Cerebrovascular disease is currently one of the three major diseases causing human death in the world. According to China’s 1991 statistics, the number of strokes in China reached 1.5 million each year, and is the first cause of death in many regions. Cerebrovascular disease not only has a high mortality rate, but also a high disability rate. Some patients are critically ill, and after rescue, they suffer from hemiplegia, dysphagia, aphasia or dementia, causing a heavy burden to families and society. The main risk factors of cerebrovascular disease: 1. hypertension, cerebral atherosclerosis; 2. diabetes; 3. coronary heart disease; 4. familial genetics, etc.