Dilated cardiomyopathy, or dilated cardiomyopathy, is an enlargement of the heart that is usually difficult to reverse and cannot be reduced, but can be treated aggressively to relieve symptoms. Dilated cardiomyopathy is usually characterized by enlargement of the left ventricle or both ventricles, accompanied by myocardial contractile dysfunction. The disease starts slowly with an enlarged heart, and symptoms such as dyspnea and lower extremity edema occur only when the heart fails to compensate. During this period, the enlarged heart is difficult to reverse. The treatment of the disease includes general treatment, drug treatment, and cardiac resynchronization therapy. General treatment such as preventing infections, abstaining from alcohol, improving nutritional imbalance, etc., try to avoid risk factors for the development of the disease. Drug therapy is based on symptomatic treatment, such as for symptoms such as chest tightness, shortness of breath, edema, etc., can be treated with diuretics, such as furosemide, hydrochlorothiazide and so on. For people with left ventricular ejection fraction less than 40%, angiotensin-converting enzyme inhibitors and β-receptor antagonists are needed when there is no contraindication, the former are commonly used such as captopril, enalapril, etc., and the latter are commonly used such as carvedilol, metoprolol, etc. The specific use of drugs varies according to the condition. The specific medication varies according to the condition and should be administered according to the doctor’s prescription. For some people with heart failure, cardiac resynchronization therapy can be used on the basis of drugs, which can restore the normal synchronous contraction of the left and right ventricles, thus improving cardiac function. Although it is difficult to cure dilated cardiomyopathy, it can be actively treated under the guidance of a doctor to prevent further enlargement of the heart and improve the prognosis of the disease.