Cardiovascular stenosis 70, usually refers to the coronary artery left anterior descending branch, the swing branch and the right coronary artery of the three main coronary vessels stenosis degree of 70%, such patients should do stents, but also depending on the situation, whether the need to do stents is also recommended to listen to the doctor’s opinion. 1, the coronary artery left anterior descending branch, the swing branch and the right coronary artery localized 70% stenosis: the degree of patients in the stenting procedure in the critical value. The patient’s lesion degree is at the critical value of cardiac stent surgery, the first drug treatment can be followed by the application of aspirin, hydroclopidogrel and other antiplatelet aggregation, statin ester regulation and stabilization of vascular plaque, as well as metoprolol and other control of ventricular rate and reduce myocardial oxygen consumption, isosorbide nitrate and other treatments, if the patient’s symptoms are relieved, you can continue to treat conservatively. However, if the patient still has recurrent angina and other symptoms, then consider interventional therapy; 2, if the left main vessel lesions, usually more than 50% stenosis degree is recommended for surgical treatment, and it is recommended to listen to the doctor’s opinion on the need for stenting; 3, coronary angiography suggests that the blood vessels are in the critical lesions, but also can be done to further coronary intraluminal imaging, such as optical coherence tomography (OCT) or intravascular ultrasound (IVUS), and so on. To assess the degree of stability of the coronary plaque, if the coronary plaque is extremely unstable and at high risk of rupture, early surgical treatment is recommended to minimize the risk of progression to acute myocardial infarction. At the same time, blood flow reserve fraction (FFR) and other tests can be performed to assess whether the distal blood pressure can guarantee myocardial perfusion, and if not, intervention is recommended. In addition, for the assessment of critical lesions, the severity of ischemia can also be assessed by means of exercise stress tests, which can help to evaluate whether surgical treatment is needed. In conclusion, once a coronary artery reaches 70% stenosis, a definitive diagnosis of coronary artery disease is made, and regular pharmacologic therapy is required, with or without interventional intervention. Whether or not to perform cardiac stenting is closely related to the extent of the lesion, and it is advisable to follow the doctor’s arrangement for the specific treatment plan.