The effect of alcohol on blood vessels has a two-way regulation, moderate drinking, alcohol is good for improving cardiovascular function and reducing the incidence of cardiovascular disease, but excessive drinking, that is, alcohol abuse, is very harmful to the human body, especially cardiovascular. A small amount of alcohol can promote blood circulation, improve the internal environment of human blood vessels, increase the elasticity of blood vessels, which is beneficial for the prevention of cardiovascular and cerebrovascular diseases. Generally wine should be about 50ml, this alcohol concentration is very little stimulation for the human body, and the benefits are very great. However, drinking large amounts of wine will make the blood pressure in the blood vessels become unstable, causing low blood pressure in the early stage due to diuretic effect of the body, and high blood pressure in the later stage. This instability of blood pressure can cause or induce coronary heart disease, myocardial infarction, cerebral thrombosis and other diseases.