The duration of dilated cardiomyopathy combined with heart failure varies, from death after one year of onset in the shortest cases to a life expectancy of 20 years or more in the longest cases. Dilated cardiomyopathy has no clear etiology and can usually be caused by overwork, poor lifestyle habits, and prolonged late nights. The condition is characterized by enlarged heart chambers, decreased myocardial contractility, and decreased left ventricular ejection fraction, leading to heart failure, which has a poor prognosis. The duration of dilated cardiomyopathy varies from one year after the onset of the disease to 20 years or more. In the past, the 5-year survival rate was around 50%. In recent years, due to the improvement of treatment, the 5-year survival rate has been significantly improved at home and abroad, and it can reach 65.5%～75%. Patients should actively follow the doctor’s instructions to take anti-heart failure drugs to prevent the emergence of malignant ventricular arrhythmia, the life expectancy is likely to reach 20 years if the prognosis is good. When the disease progresses further, organ transplantation is possible.