The five horses of hypertension are the five major classes of antihypertensive drugs for conventional treatment: I. Diuretics, there are three types of diuretics: thiazides, tab diuretics and potassium-protective diuretics, of which thiazide diuretics are the most used, commonly used drugs are hydrochlorothiazide. Second, beta-blockers, commonly used drugs are metoprolol, bisoprolol, etc. Third, calcium antagonists, including calcium antagonists including commonly used felodipine, nifedipine and amlodipine, now more commonly used drugs is amlodipine, longer duration of action, and the effect of lowering blood pressure is relatively smooth and sustained. Angiotensin converting enzyme inhibitors, commonly used drugs are Benazepril, Enalapril, Fosinopril. Angiotensin II receptor antagonists, commonly used drugs are Irbesartan, Valsartan, etc.