Cerebrovascular disease is a common and frequent disease with a high disability rate, and is the third leading cause of death from human disease. Prevention of cerebrovascular disease includes: controlling various risk factors and changing unhealthy lifestyles; reducing or postponing the occurrence of the disease by treating the causes and preventive treatment. There are many risk factors for cerebrovascular disease, according to incomplete statistics, there are more than 250 kinds, the common ones are: 1. Hypertension: It is the most important risk factor, whether it is high pressure or low pressure (systolic/diastolic pressure) increase, the height of blood pressure and the duration of the disease are closely related to cerebrovascular. Shi Jin, Department of Neurology, Air Force General Hospital 2. diabetes mellitus: diabetes mellitus is the second most important risk factor after hypertension, and diabetes mellitus can cause cerebral infarction 10-20 years earlier and increase the incidence 2-4 times. 3. hyperlipidemia: it increases blood viscosity and accelerates the process of cerebral atherosclerosis. High cholesterol and high triglyceride, especially high and low-density lipoprotein levels are associated with ischemic cerebrovascular disease. 4. heart disease: coronary heart disease and cerebrovascular disease have a common pathogenesis, both often coexist, while heart valve disease, coronary heart disease, myocardial infarction, cardiac insufficiency, arrhythmia, etc. are important causes of cerebrovascular disease. 5. smoking: the risk of cerebrovascular disease is related to the amount and duration of smoking. 6. alcoholism: the chance of cerebrovascular disease increases 4-5 times in alcoholics, especially cerebral hemorrhage. 7. hyperhomocysteinemia: a risk factor for cerebrovascular disease, especially ischemic cerebrovascular disease. 8. low physical activity, high salt, high fat diet, obesity, drug abuse, etc. Also age, gender, race, climate, family history also its risk factors.