Dilated cardiomyopathy has a slow onset, from the detection of an enlarged heart on examination to the gradual onset of symptoms, which may occur after 10 years, and in a few patients it can go into rapid progression in a short period of time. Dilated cardiomyopathy is initially detected on X-ray and presents as an enlarged heart with an uncertain onset. It may develop quickly, in a few years, or after 10 years. The majority of patients are idiopathic and the cause of onset is usually not identified. In other patients, the onset of the disease runs in families and may be caused by alcohol consumption, viral infections, or an autoimmune response. Dilated cardiomyopathy has no obvious symptoms in the early stages, but it must be detected and treated early. At the beginning of the examination, we should go to the hospital as soon as possible to do the next examination, to clarify the specific cause of the disease, early treatment, control the development of the disease is the key. Otherwise, in the middle and late stages, the patient’s condition aggravates, not only the difficulty of treatment, but also a delay in the treatment of good opportunities.