Secondary prevention measures for coronary heart disease are mainly formulated for patients who have been clearly diagnosed with coronary heart disease. The main objectives of secondary prevention are as follows: 1. to prevent the onset of angina pectoris; 2. to improve the prognosis and reduce the chance of adverse events in patients. Secondary prevention of coronary heart disease mainly includes the following five aspects: 1, taking aspirin, ACEI class of drugs, patients with a clear diagnosis of coronary heart disease, it is recommended to be long-term aspirin, ACEI class commonly used Benadryl, Captopril, Perindopril and other drugs; 2, control blood pressure, there are also taking beta-blockers, commonly used betaloc, Arolole, Bisoprolol fumarate this This kind of drugs can control the patient’s blood pressure and slow down the occurrence of cardiovascular events; 3, control blood lipids and quit smoking; 4, take hypoglycemic drugs and control the diet; 5, provide health education to patients and strengthen exercise appropriately.