Calcium channel blocker is in the clinical application of a very large number of drugs, this drug can be used to reduce the patient’s blood pressure in addition to inhibit the spasm of the coronary arteries, can play a certain role in anti-angina. For stable or unstable as well as variant angina, all have certain efficacy. This drug is a relatively safe drug, its representative drugs are mainly felodipine, nifedipine, if like non-dihydropyridine calcium channel blockers, and verapamil, diltiazem, like this type of calcium channel blocker also has a certain antiarrhythmic effect, so calcium channel blockers are widely used, but also with it has a lot of role is closely related. In the process of medication, patients are advised to pay attention to monitoring blood pressure and heart rate.