1. Hypertensive disease, whether hemorrhagic stroke or ischemic stroke, hypertension is the most important independent risk factor. Blood pressure is gradually reduced to below 140/90mmHg by antihypertensive drugs and low salt diet. 2. Diabetes mellitus, blood glucose is lowered to 3.9-6.1mmol/L normal range through controlled diet and glucose-lowering drugs. 3. Heart disease, such as rheumatic heart disease, coronary heart disease. Especially to prevent atrial fibrillation caused by embolism caused by brain embolism. 4, lipid metabolism disorders, very low density lipoprotein, low density lipoprotein is the most important lipoprotein that causes atherosclerosis, high density lipoprotein is anti-atherosclerotic lipoprotein. 5, transient ischemic attack (TIA), TIA itself is a type of ischemic stroke classification, can also be a precursor or anterior area symptoms of cerebral infarction, should be treated promptly. 6, smoking and alcohol abuse; 7, blood rheology disorders, especially the decrease in cerebral blood flow when the viscosity of whole blood increases, in which the increase in erythrocyte ratio and fibrinogen level is the main risk factor of ischemic stroke; 8, obesity, obesity and overweight are both risk factors of ischemic stroke, not related to hemorrhagic stroke. 9, age and gender, age is an important risk factor for atherosclerosis, the degree of atherosclerosis increases with age. 50 years of age or older with the increase in the incidence of stroke, but the author found that the incidence of stroke in young and middle-aged people also increased, can not be ignored. Generally speaking, the incidence of stroke in women is lower than that in men.