The most common antihypertensive drugs can be classified into five types according to their mechanism of action. Calcium antagonists, angiotensin-converting enzyme inhibitors, angiotensin receptor antagonists, diuretics, and beta-blockers. These drugs have different mechanisms of action and can be used for the initial and maintenance treatment of hypertension, but each has its own characteristics and indications. 1, diuretics: By promoting the production of urine, eliminating the excess fluid in the blood, reducing the blood volume in the circulatory system and lowering blood pressure. Such as tachyphylaxis, dihydroketuria. 2, beta-blockers: make the heart beat slowly, contraction force is reduced thus lowering blood pressure and improving blood flow. Such as metoprolol, bisoprolol. 3, angiotensin-converting enzyme inhibitors: block the role of renin angiotensin, diastolic blood vessels, reduce water and sodium retention. Such as benazepril, lenopril, etc. 4, angiotensin II receptor blockers: through the inhibition of angiotensin receptors, play a similar role to angiotensin converting enzyme inhibitors. Such as valsartan, temisartan, etc. 5, calcium channel blockers: through the inhibition of calcium ions into the heart cells and muscle cells within the blood vessel wall to slow the heart rate, vasodilatation to reduce blood pressure. Such as amlodipine, nifedipine, etc. Chinese medicine treatment of hypertension is divided into six types of evidence: hyperactivity of liver and yang, deficiency of yin and yang, deficiency of liver and kidney yin, phlegm obstruction, blood stasis and deficiency of both yin and yang.