1, primary prevention of coronary heart disease is that the patient does not have diabetes, but has a variety of risk factors, such as hypertension, diabetes, hyperlipidemia, obesity, too little exercise, smoking, alcohol abuse, control of these high-risk factors, comprehensive treatment, the most basic measure is to change the poor lifestyle, advocate a healthy diet, advocate aerobic exercise, such as walking, jogging, cycling, playing tai chi, maintain an optimistic 2.Secondary prevention means that patients already have coronary heart disease, early diagnosis and early treatment, prevention of disease development, prevention of various complications, its treatment includes control of high blood lipids, treatment of hypertension, control of diabetes, as well as improving coronary circulation, reducing myocardial oxygen consumption, and anti-platelet aggregation, such as the use of aspirin and clopidogrel Treatment. 3. Tertiary prevention means patient resuscitation as well as rehabilitation to prevent and delay chronic complications, reduce mortality and improve patients’ quality of life. For specific preventive measures, in addition to intensive treatment for secondary prevention, anticoagulation therapy is needed, and thrombolytic therapy is required in severe cases, which has a preventive effect on stable angina, myocardial infarction and reinfarction.