The heart is a very important organ that supplies blood circulation throughout the body, and the heart itself also needs sufficient blood supply. The blood vessels that supply blood to the heart are called coronary arteries, which include the left and right coronary arteries, and the left coronary artery is divided into the anterior descending branch and the spiral branch. Coronary artery disease is formed on the basis of coronary artery atherosclerosis, atherosclerotic plaque, accumulate on the coronary artery intima, over time, more and more, so that the coronary artery lumen is severely narrowed or even occluded, resulting in the supply of myocardial blood flow is reduced, insufficient oxygen supply, so that the heart’s own blood supply is reduced and lead to myocardial ischemia of a myocardial lesion, myocardial severe ischemia will cause the patient “Sudden death” means sudden death. The most common symptoms of coronary artery disease include panic attacks, tightness in the precordial region, breath-holding, paroxysmal retrosternal crushing pain, i.e. angina, paroxysmal pain in the left arm or epigastrium; some patients show persistent severe chest pain, which is often accompanied by acute myocardial infarction and is life-threatening; some people have no symptoms and are found during physical examinations or visits for other diseases, called insidious coronary artery disease or asymptomatic coronary artery disease. Electrocardiography, cardiac ultrasound and EBT can help diagnose coronary artery disease, and coronary angiography can provide the basis for coronary artery disease diagnosis. Coronary artery disease is the result of a long-term combination of causative factors. High blood cholesterol, hypertension and smoking are the main risk factors for coronary heart disease. People with one, two or three major risk factors, respectively, have two, four or eight times the incidence of coronary heart disease and death rate compared with those without these factors; factors such as low physical activity, lack of physical exercise, overweight, diabetes, mental stress and family history of coronary heart disease are all listed as secondary risk factors. At present, the treatment of coronary heart disease is mainly divided into medical drug therapy, interventional stent therapy and surgical treatment, among which surgical treatment (coronary artery bypass grafting) has broader indications, avoids short-term restenosis or obstruction, has a high patency rate in the late stage, and its therapeutic effect is definitely recognized internationally as the most effective method for treating coronary heart disease, and its long-term efficacy is better than other treatment methods. Coronary artery bypass grafting is the application of blood vessels to create a channel between the proximal and distal ends of the coronary artery stenosis, allowing blood to bypass the stenosis and reach the distal end, like a bridge that allows a highway to cross a ravine or river, thus improving the symptoms of myocardial ischemia and achieving the purpose of treatment. The vessels applied are the patient’s own saphenous vein, internal mammary artery or radial artery, etc.