Atherosclerosis of the coronary arteries is the direct cause of coronary heart disease. Coronary heart disease is simply a heart disease caused by narrowing of the coronary arteries of the heart, the full name of the “coronary atherosclerotic heart disease”. To use an analogy, just like a water pipe used for a long time, the inside will grow water rust. Our blood vessels will also grow plaque, this plaque is called atherosclerotic plaque. With the gradual aggravation of this plaque, the heart coronary artery lumen narrowed to more than 50%, it is called coronary heart disease. There are many causes of coronary atherosclerosis, which are currently related to genetic predisposition, advanced age, hyperlipidemia, hypertension, diabetes, smoking, obesity, physical inactivity, unhealthy diet, and kidney disease. Active prevention and intervention of these risk factors can help avoid the occurrence of coronary atherosclerosis. The treatment of coronary artery disease is mainly a healthy lifestyle combined with regular medication. Healthy lifestyle includes abstaining from smoking and alcohol, controlling diet, exercising consistently, controlling body weight, and regular work and rest. Medications include aspirin and statins plus angina relief medications. Coronary atherosclerosis is the direct cause of coronary heart disease. However, there are many factors that cause coronary heart disease, mostly related to various chronic diseases and poor dietary habits. In order to reduce the incidence of coronary heart disease and alleviate its serious harm, we must start by eliminating these risk factors. Early prevention, early detection, early benefit.