The preferred antihypertensive drugs for the elderly over 70 years old should be different from person to person. If simple hypertension is preferred, calcium antagonist such as amlodipine is preferred; if combined with coronary artery disease, angiotensin II receptor inhibitor and angiotensin-converting enzyme inhibitor such as enalapril and candesartan are preferred; and if combined with heart failure, diuretics such as hydrochlorothiazide are preferred. 1. Simple hypertension: hypertension in the elderly is characterized by increased systolic blood pressure, decreased diastolic blood pressure and increased pulse pressure. Calcium ion antagonists can antagonize the inward flow of calcium ions and diastole the smooth muscle of the blood vessels, so as to play a role in lowering the blood pressure, and the effect of lowering the blood pressure is smooth, and the commonly used medicines are amlodipine, nifedipine extended-release tablets/controlled release tablets, and so on. 2. Combined with coronary artery disease: if combined with coronary artery disease patients with myocardial ischemia, easy myocardial remodeling, scar formation, caused by myocardial contractility and diastolic force decline, angiotensin II receptor inhibitors and angiotensin-converting enzyme inhibitors, lowering blood pressure at the same time and take into account the inhibition of myocardial remodeling, the commonly used drugs are enalapril, candesartan, etc.. 3. Combined heart failure: heart failure patients are usually combined with sodium and water retention, diuretics can effectively reduce the circulating blood volume, reduce the cardiac load, alleviate the symptoms of heart failure and reduce blood pressure, commonly used drugs are hydrochlorothiazide, furosemide, spironolactone and so on. Elderly people’s blood pressure fluctuation is relatively large, prone to postural blood pressure and postprandial hypotension, taking medication is recommended under the guidance of a doctor, do not blindly take medication to avoid aggravating the condition.