At this stage, coronary artery disease is still a chronic progressive disease that cannot be cured, and interventional therapy only plays the role of “unblocking”. Therefore, after coronary intervention, it does not mean that everything is fine, and follow-up treatment must be carried out. This follow-up treatment includes both intervention-related and non-intervention-related components. The main components that are directly related to the intervention are: (1) Continue to take clopidogrel. Dosage: clopidogrel 75 mg once daily; ticlopidine 250 mg twice daily for the first week after surgery, and 250 mg once daily after 1 week. It is generally believed that the above drugs should be continued for more than 1 year after interventional treatment. (2) Aspirin 100 to 300 mg once daily; for life. The contents that are not directly related to interventional treatment are mainly “water quality improvement” and “water conservation” measures, including: ① Lipid-lowering treatment. In recent years, many large-scale clinical trials have confirmed that statin lipid-lowering drugs (such as atorvastatin, simvastatin, pravastatin, lovastatin, fluvastatin, resevastatin, etc.) are effective in reducing the chance of cardiac events in patients with coronary artery disease (with or without intervention). Therefore, as long as there is no reason why these drugs cannot be used, they should be taken for life. ②b-blockers. A large number of studies have proved that b-blockers can reduce the incidence and mortality of myocardial infarction in patients with coronary artery disease and narrow the scope of myocardial infarction. Therefore, these drugs are also routinely taken for life. For example, Medocin, Aminocin, Bisoprolol, etc. ③Control other risk factors of coronary heart disease, including treatment of diabetes, hypertension, quit smoking and change other bad habits.