50% stenosis of the left anterior descending branch of the heart firstly through lifestyle intervention, followed by etiologic treatment, symptomatic treatment and so on. 1. Dietary regulation: low-fat and low-salt diet, quit smoking and drinking, exercise properly, avoid staying up late, avoid emotional excitement, prevent coronary vasospasm and stenosis aggravation, which will lead to adverse consequences. 2. Etiological treatment: find the cause of the disease, control the original disease, the factors that cause coronary stenosis are often related to high blood pressure, high blood lipids, diabetes, these conditions should be strictly controlled, so that blood pressure, blood sugar, blood lipids are controlled at the normal level, so as to avoid further aggravation of coronary artery stenosis. 3. Symptomatic treatment: coronary stenosis may cause chest tightness, chest pain and other symptoms of myocardial ischemia, it is recommended that the use of drugs to expand the coronary blood vessels, such as isosorbide nitrate tablets; inhibit platelet aggregation of drugs, such as aspirin enteric-coated tablets; lipid-lowering drugs, such as reserpinevastatin tablets, etc., specific to the guidance of the doctor under the guidance of the use of medication, if coronary stenosis of more than 75% of the need to carry out interventional surgery. If the stenosis of coronary artery exceeds 75%, interventional surgery should be carried out. If symptoms exist, consult a doctor in time to avoid delaying the condition.