This topic studies the prevention of coronary heart disease and patient education. The prevention of coronary heart disease in normal population belongs to the first-class prevention; Patients with existing coronary heart disease should also prevent recurrent infarction and other cardiovascular events, which is called secondary prevention. Primary prevention of coronary heart disease: ① Lifestyle intervention: low-salt, low-fat diet rich in fruits and vegetables, quitting smoking, regular exercise, weight control and psychological balance; ② Intervention of dyslipidemia: LDL-C is the primary goal of lipid-lowering treatment for patients with dyslipidemia, and statins are the first choice; ③ Monitoring and control of blood sugar: actively intervene in abnormal glucose tolerance, first strengthen lifestyle intervention, and take metformin or acarbose orally for those who are ineffective for 3 ~ 6 months; ④ Blood pressure monitoring and control. Secondary prevention of coronary heart disease: patients who are definitely diagnosed with coronary heart disease should generally adhere to long-term drug treatment, including taking one or two antiplatelet drugs, beta blockers, statins and ACEI/ARB ... strictly control risk factors and carry out planned and appropriate exercise. Education for patients with coronary heart disease: ① Maintain a healthy lifestyle; ② Remove the inducement; ③ Once the acute attack of coronary heart disease is suspected, immediately chew aspirin 300mg, take nitrate under the tongue and call the emergency number; ④ When using anti-platelet aggregation drugs and anticoagulants for the first time, we should closely monitor bleeding symptoms, such as subcutaneous bleeding and occult blood in stool.