Left anterior branch block, if not combined with other conduction block and organic heart disease, usually does not need treatment. Others need active treatment, which mainly includes symptomatic treatment and causative treatment. 1. Symptomatic treatment. For the combination of two-branch or three-branch block with symptoms such as syncope or blackout, pacemaker treatment can be used. 2. Causal treatment. For ischemic diseases such as coronary heart disease caused by the left anterior branch block can take drugs such as aspirin, metoprolol, etc., and can be treated with stents. Myocarditis can be caused by antiviral drugs such as ribavirin, and at the same time to ensure adequate rest. Hypertensive heart disease caused by can take antihypertensive drugs such as nifedipine, indopril and so on. Other diseases such as hypokalemia, hyperkalemia, and hypochlorhydria can also cause left anterior branch block, and appropriate measures should be taken to improve electrolyte disorders. Left anterior branch block should be treated according to the doctor’s requirements, and the medication should be used according to the doctor’s instructions.