The diagnosis of coronary artery disease is based on the following aspects: 1. chest tightness or chest pain in the precordial region after activity or exertion. 2. risk factors for coronary artery disease, such as high blood pressure, obesity, high blood fat, high blood sugar, smoking, emotional tension, anxiety, stress, etc. 3. other ancillary tests for coronary artery disease, such as electrocardiogram, ambulatory electrocardiogram, cardiac ultrasound, coronary artery CTA, etc. 4. The gold standard for coronary artery disease is coronary angiography, which reveals a stenosis of more than 50% and angina pectoris of more than 75%. In conclusion, coronary artery disease is a common chronic disease, it is recommended to carry out standardized and effective treatment under the guidance of cardiovascular physicians in regular hospitals.