Coronary heart disease is a type of heart disease in which atherosclerosis of coronary arteries causes narrowing of the lumen of blood vessels and leads to insufficient blood supply to the heart muscle. It is a common disease in middle-aged and old-aged populations, and seriously jeopardizes the health of human beings. Coronary heart disease is mainly divided into five clinical types, namely, asymptomatic myocardial ischemia, angina pectoris, myocardial infarction, ischemic cardiomyopathy and sudden cardiac death. Treatments for coronary artery disease mainly include drug therapy, percutaneous coronary stenting and surgical bypass surgery. Many patients ask if they have to have a stent if they are diagnosed with coronary artery disease. The answer is not necessarily. Generally speaking, there are three types of stent treatment for coronary artery disease: one type is without stent, which generally means that although coronary artery disease has not yet reached the standard of stenting, and medication can be used to treat it. The second type is the need to put a stent. The third type is unable to put stent, generally refers to the coronary vascular disease is more serious, can not perform coronary intervention stent treatment, then need surgical treatment or only conservative treatment. This article mainly introduces which patients need stenting. As one of the main ways to effectively treat coronary heart disease, coronary intervention stenting has been recognized by clinicians and patients for its safety and effectiveness. Interventional therapy can effectively improve the symptoms of angina pectoris, and at the same time can reduce myocardial infarction, prevent the occurrence of sudden death, and save lives. Coronary heart disease coronary intervention of the crowd include: 1, unstable angina, at any time there is a risk of myocardial infarction people; 2, angina patients by the optimal drug treatment symptoms can not be stabilized; 3, coronary angiography results show: the left trunk stenosis of more than 50%, a single coronary artery stenosis of more than 75%; 4, the occurrence of acute myocardial infarction within 12 hours; 5, coronary heart disease patients with a younger age, in order to improve the quality of life of patients, etc. Although coronary stent technology is mature and widely used, stent intervention has its advantages and disadvantages, the advantages of which are that it does not require incision, little damage, quick recovery, immediate effect and little disturbance to the body. The disadvantages are that stents are relatively expensive, invasive operations carry certain surgical risks, and the treatment costs charged by interventional therapy are quite high.