Dilated cardiomyopathy is a heterogeneous myocardial disease, clinically characterized by progressive heart failure, arrhythmia, thromboembolism, and sudden death. Cardiomyopathy is mainly myocardial hypertrophy and myocardial fibrosis. The pathogenesis may be related to immune response, virus infection, and genetic factors. This article reviews the common causes and signaling pathways of dilated cardiomyopathy, providing theoretical basis for the treatment of dilated cardiomyopathy and also provide direction and perspective for the diagnosis and treatment of chronic Keshan disease.