Calcium channel blockers are divided into dihydropyridine calcium channel blockers and non-dihydropyridine calcium channel blockers. Dihydropyridine-type calcium channel blockers are represented by nifedipine, amlodipine, nitrendipine, lacidipine, etc. Non-dihydropyridine-type calcium channel blockers are represented by verapamil and diltiazem. Dihydropyridine calcium channel blockers are often used in the antihypertensive treatment of hypertension. Non-dihydropyridine calcium channel blockers are usually used to treat angina pectoris in coronary artery disease and improve myocardial ischemia due to their relatively strong effects of inhibiting myocardial contraction, inhibiting myocardial conduction and slowing down heart rate, as well as dilating coronary arteries and relieving coronary artery spasm. Non-dihydropyridine calcium channel blockers should not be used when the patient has heart failure, sinus node hypofunction, and heart block.