Coronary heart disease is a heart disease caused by ischemia and hypoxia of the myocardium due to atherosclerosis of coronary arteries. Coronary heart disease is a common and frequent disease among middle-aged and elderly people, which seriously endangers human life. Many factors are closely related to the development of coronary heart disease, and these factors are called coronary heart disease risk factors. Smoking and alcohol consumption are important risk factors for coronary heart disease. The prevalence of coronary heart disease is five times higher in smokers than in nonsmokers, and is proportional to the amount of smoking. Smokers have increased carbon monoxide hemoglobin in the blood, and nicotine in the cigarette constricts blood vessels, resulting in arterial damage due to lack of oxygen in the arterial walls. Drinking alcohol: long-term heavy drinking of high alcohol has a damaging effect on the function of the heart, blood vessels, liver and other organs, which can lead to alcoholic cardiomyopathy, cirrhosis of the liver, hypertension; elderly “three high” hypertension: is an important risk factor for coronary heart disease. Hypertensive patients with coronary heart disease are four times more likely than those with normal blood pressure. 60% to 70% of patients with coronary heart disease suffer from hypertension when the arterial pressure increases, the shear stress and sidewall pressure changes cause damage to the intima, while elevated blood pressure causes plasma lipids to infiltrate into the intima cells, thus causing platelet accumulation and smooth muscle cell proliferation and atherosclerosis. Hyperlipidemia: Hypercholesterolemia is an important risk factor for coronary heart disease and the risk of coronary heart disease increases 5 times in people with hypercholesterolemia compared to normal people. Recent studies have shown that hypertriglyceridemia is also an independent risk factor for coronary heart disease. High-density lipoprotein has a protective effect against coronary heart disease and its value is reduced in those who are prone to coronary heart disease. Diabetes: It is an important risk factor for coronary heart disease. The risk of coronary heart disease in diabetic patients is 2 times higher than normal people; the risk of coronary heart disease in female diabetic patients is 3 times higher than male patients and they are prone to heart failure, stroke and death. Diabetics are prone to coronary heart disease. Although obesity is not as important as hypertension, hyperlipidemia and diabetes, obesity can indirectly affect coronary heart disease by promoting the development of these three factors. Exercise can regulate and improve the endothelial function of blood vessels and promote the establishment of coronary collateral circulation in patients with coronary heart disease. However, the better and greater risk factors are still due to the acquired controllable risk factors. Therefore, coronary heart disease can be prevented early, and all people should stay away from the risk factors of coronary heart disease since childhood.