The common factors of complete left bundle branch block are coronary heart disease, congestive heart failure, etc. The cause of the disease should be identified in time to take relevant treatment. Treatment methods include general treatment, drug treatment, surgical treatment and so on. If it is caused by coronary heart disease, you need to actively exercise and avoid eating oily and spicy food so as not to aggravate the disease. If it is mild to moderate insufficient blood supply to the heart, you can take some drugs to improve the blood supply to the heart, such as Bisoprolol and so on. If the blockage of coronary artery is more serious, stent implantation may be needed. If congestive heart failure is the cause, the main treatment is medication. Diuretics, such as hydrochlorothiazide, can be used to reduce the burden on the heart as prescribed by the doctor. ACEI drugs, also known as angiotensin-converting enzyme inhibitors, such as perindopril, ramipril, and other pulsatilla drugs, can help to improve ventricular remodeling and shrink the heart, thus improving the prognosis for patients with congestive heart failure. The presence of complete left bundle branch block should be seen promptly to avoid delays.