The full name of coronary heart disease is coronary atherosclerotic heart disease, also known as ischemic heart disease. The onset of the disease is due to atherosclerosis of coronary arteries caused by a variety of factors, resulting in insufficient blood supply to the heart muscle. It was once divided into: asymptomatic type, angina pectoris type, myocardial infarction type, ischemic cardiomyopathy, and sudden death type. In recent years, medical experts have further divided it into chronic coronary artery disease (including stable angina, syndrome X, ischemic cardiomyopathy, etc.) and acute coronary syndrome (including unstable angina, ST-segment elevation myocardial infarction and non-ST-segment elevation myocardial infarction). Coronary heart disease is a disease with high mortality and disability, which seriously affects patients’ quality of life. Coronary artery disease is a disease of systemic atherosclerosis that manifests itself in the heart. The high-risk factors that cause coronary heart disease are generally: smoking, hypertension, diabetes, hyperlipidemia, and obesity. The main manifestation is paroxysmal pain or discomfort in the precordial region or behind the sternum, varying in severity, with intermittent and recurrent episodes, each of which lasts for a short period of time. It is often triggered by overexertion, mental stress or overstimulation, but it can also occur at rest or even during sleep without any trigger. In some cases, the pain may radiate to the base of the neck, left shoulder, left upper arm, upper abdomen, or back during the attack. Prevention of coronary heart disease should start with changes in people’s daily lifestyle. After the age of 40 for men and after menopause for women, the chance of developing coronary heart disease increases greatly, especially for people who smoke, have high blood pressure, diabetes, are obese or have close relatives who have had strokes or coronary heart disease. In general, the daily diet should be light, mainly low-salt and low-fat diet, try to or not to consume high-fat diet, planned and reasonable scientific exercise, scientific treatment of hypertension and diabetes, weight control, and quit smoking. At present, the diagnosis of coronary heart disease general basic examination includes: electrocardiogram, cardiac ultrasound, chest X-ray, etc. For patients suspected of having coronary heart disease, if the above examination is not obviously abnormal, dynamic electrocardiogram and stress test (exercise test) are feasible. The doctor can make a preliminary diagnosis based on symptoms, signs and auxiliary examinations. The gold standard for coronary artery disease diagnosis is still coronary angiography. This is an invasive test in which a special catheter is used to inject a contrast agent into the coronary arteries that supply blood to the heart and reveal changes in the anatomy of the coronary arteries under x-ray exposure. The test usually requires hospitalization in China. Treatment of coronary artery disease: It includes pharmacological and non-pharmacological treatment. Drug therapy: anti-platelet aggregation (usually aspirin, clopidogrel, etc.), anti-arrhythmia (β-blockers, calcium antagonists, etc.), anti-angina (nitrates, β-blockers, calcium antagonists, etc.), ACE, lipid regulation (statins), blood pressure control, treatment of diabetes. Non-pharmacological treatment: lifestyle changes, smoking cessation, weight control, scientific and reasonable exercise, but physical exercise is not recommended for patients with heart failure, arrhythmia after exercise, and angina pectoris can be induced at low exercise levels. If the effect of reasonable medication is not satisfactory and angina is aggravated and frequent (acute coronary syndrome), the stenosis should be solved as soon as possible, i.e., interventional treatment (stent implantation) or coronary artery bypass surgery should be performed based on the diagnosis of coronary angiography. For acute infarction, time is cardiomyocyte, time is life, and revascularization treatment should be performed as soon as possible, such as thrombolysis (ST-segment elevation infarction) or interventional treatment, or surgical bypass surgery. Do not just stop changing drugs or abuse drugs, and do not follow other patients’ treatment plans, because each person’s own situation is different, and the treatment plan drawn up by the doctor is individualized, so you should always communicate with your doctor and adjust your treatment, exercise reasonably, eat reasonably, stop smoking and drinking, control your weight, and treat hypertension and diabetes. In conclusion, people suffering from coronary heart disease should pay high attention to it, but their mind should be calm, avoid anxiety and emotional excitement, build up confidence, scientific and reasonable treatment to improve life treatment.