Early coronary artery disease is generally treated conservatively with drugs, as follows: 1, antithrombotic therapy: the application of aspirin, clopidogrel, tigretol, etc., can effectively prevent thrombosis; 2, lipid-lowering therapy: the use of lipid-lowering drugs to control the further expansion and aggravation of coronary atherosclerotic plaque, while preventing plaque rupture, to avoid myocardial infarction; 3, vasodilator therapy: the application of isosorbide mononitrate and other expansion 3, vasodilator therapy: apply isosorbide mononitrate to dilate coronary arteries, improve vascular endothelial function, and prevent angina attack; 4, other treatment: use symptomatic drugs to slow down heart rate or reduce myocardial oxygen consumption. The specific medication should be combined with the clinical, subject to the guidance of the doctor’s interview.