Most patients with various cerebrovascular diseases have no obvious symptoms before the onset of the disease, and once it occurs, whether it is ischemic or hemorrhagic, the treatment effect is limited and the death and disability rates are high. Therefore, the key to cerebrovascular disease is prevention, which cannot be overemphasized. The primary prevention of cerebrovascular disease is to prevent or delay the occurrence of stroke; the secondary prevention is to prevent recurrence of stroke after it has occurred. Here we will focus on some measures for primary prevention. 1. Effective control of hypertension Hypertension is the most important risk factor for cerebral hemorrhage and cerebral infarction. A domestic clinical study has shown that antihypertensive treatment can reduce stroke mortality by 58%. 2, effective control of diabetes mellitus Some data show that type 2 diabetes mellitus can increase the risk of stroke by 2 times. 3.Effective control of dyslipidemia Give statins to those with high LDL-C and fibrates to those with high TG, and combine the two types if necessary. 4, long-term use of antiplatelet drugs Men > 40 years old, women > 50 years old with a variety of stroke risk factors, long-term use of small doses (75-150mg/day) of aspirin to prevent ischemic stroke. 5.Change poor lifestyle Quit smoking, limit alcohol, eat properly, control weight, enhance physical activity, maintain psychological balance, etc. 6.Several important interventions Consider endarterectomy or endovascular intervention for severe carotid artery stenosis, and endovascular intervention for severe intracranial artery stenosis; give folic acid and B vitamins for hyperhomocysteinemia; give warfarin for non-valvular atrial fibrillation, etc. Small strokes (TIA, subclinical stroke) should not be neglected, and the cause should be clarified by imaging or laboratory examination and treated accordingly. The etiology should be determined by imaging or laboratory tests and treated accordingly. In addition, many people have the habit of “blood vessel flushing” twice a year to prevent stroke. The drugs used are not ineffective, but they do not work for a long time. To prevent the occurrence or recurrence of stroke, long-term comprehensive preventive measures should be maintained.