The survival of patients with dilated cardiomyopathy after diagnosis cannot be generalized; short term death may occur in 1-2 years, while long term survival may be more than 20 years. Dilated cardiomyopathy, manifested by enlargement of the left ventricle or both ventricles, is accompanied by systolic dysfunction. The life expectancy of patients with dilated cardiomyopathy is determined by a variety of factors, such as the condition, treatment, and physical and mental psychological aspects. In general, the 5-year survival rate after clinical diagnosis of dilated cardiomyopathy may reach 50%, and the 10-year survival rate is only about 25%. The prognosis of dilated cardiomyopathy varies from person to person, the disease is often progressive, death can occur at any stage of the disease, the main cause of death is heart rupture, as well as heart, respiratory and circulatory failure, some patients develop faster, their survival period is only 1-2 years, some patients develop more slowly, can survive up to about 20 years. Once dilated cardiomyopathy is diagnosed, the cause of the disease should be actively sought, such as control of infection, strict abstinence from alcohol and treatment of autoimmune diseases, as well as symptomatic treatment to slow down the progression as much as possible.