Coronary heart disease is one of the most common heart diseases, which refers to myocardial dysfunction and/or organic lesions caused by narrowing of coronary arteries and insufficient blood supply, so it is also known as ischemic cardiomyopathy. The cause of coronary heart disease is still not completely clear, but it is thought to be related to hypertension, hyperlipidemia, hyperviscosity, diabetes, endocrine function and age and other factors. Symptoms of coronary heart disease manifest as a crushing pain that occurs in the center of the chest cavity and can migrate to the neck, jaw, arms, back, and stomach. Other possible symptoms of a coronary heart attack are dizziness, shortness of breath, sweating, chills, nausea and fainting. Severe patients may die from heart failure. Prevention of coronary heart disease: 1. Reasonable diet, do not favor food, should not be excessive. To control high cholesterol, high fat food, eat more vegetarian food. At the same time to control the total calorie intake, limit weight gain. 2, life should be regular, avoid excessive tension; maintain enough sleep, cultivate a variety of interests; maintain emotional stability, avoid impatience, excitement or moping. 3, maintain appropriate physical exercise activities, enhance physical fitness. 4, drink more tea, according to statistics show that do not drink tea coronary heart disease incidence rate of 3.1%, occasionally drink tea down to 2.3%, often drink tea (drink more than three years) only 1.4%. In addition, the exacerbation of coronary heart disease, and coronary artery blood supply is insufficient and thrombosis. Tea polyphenols in the catechins and tea polybenzyl alcohol in the decoction process of the continuous oxidation of the formation of the tea pigment, in vitro experiments in animals are suggestive of significant anticoagulant, promote fibrinolysis, anti-thrombosis and other effects. 5, do not smoke, alcoholism: smoke can make the arterial wall contraction, promote atherosclerosis; and alcoholism is easy to emotional, blood pressure rise. 6, active prevention and treatment of chronic diseases in old age: such as hypertension, hyperlipidemia, diabetes mellitus, etc., these diseases and coronary heart disease have a close relationship.