Coronary artery stenosis 50% can be used to improve lifestyle, follow the doctor’s instructions to take medication on time, interventional surgery, should be analyzed on a case-by-case basis, only the appropriate treatment, there is no best treatment. 1. Lifestyle improvement: the main contents include relieving stress, avoiding mental tension, staying up late, paying attention to rest, paying attention to reasonable diet, low-salt and low-fat diet, more exercise, more fruits and vegetables, and weight control. 2. Medication: Long-term oral medication can stabilize plaque and prevent platelet aggregation, commonly used medications include aspirin, clopidogrel, simvastatin, atorvastatin, isosorbide mononitrate and so on. Specific medication should follow the doctor’s instructions. 3. Interventional surgery: some patients may have repeated episodes of chest pain associated with coronary artery stenosis, cardiac imaging examination shows that the left main stenosis reaches 50% or other blood vessel stenosis reaches 75%, after a comprehensive assessment of the risk of cardiac arrest is relatively high, the need for coronary stenting surgical treatment. If 50% coronary artery stenosis is detected, it is recommended to go to the hospital in time for a comprehensive evaluation and analysis, and then carry out targeted treatment.