diabetic cardiomyopathy (DC) is an important cause of heart failure and increased mortality in diabetes mellitus (DM) patients. Abnormal right ventricular function is a predictor of mortality in various types of heart failure. Accurate assessment of right ventricular function is of great value for the treatment and prognosis of DC patients. Two-dimensional speckle tracking (2D-STI) is a new technique that can be used for the early assessment of right ventricular function. This article reviews the application of 2D-STI in the assessment of right ventricular function in DC patients