[ ] Objective To evaluate right ventricular function in patients with Type2 diabetes mellitus(T2DM) by Tissue-Doppler Imaging(TDI) , and to determine its clinical value. Methods 30 patients with type 2 DM and 30 health people (control group) were enrolled respectively. After conventional examination by two dimensional echocardiography (2DE), right ventricular function imaging was acquired by TDI. Right ventricular diastolic and systolic pulse frequency were recorded And measured. Results TDI isovolumic contraction velocity in type 2DM and IVCv / Vs were significantly higher than those in control group. systolic velocity VS Ve/Va in type 2DM were significantly lower than those in control group. there was significant difference between two group (P<0.05). Conclusion Tissue-Doppler Imaging could be used accurately, noninvasively to determine right ventricular function of T2DM patients. RV function in patients with 2DM decreases compared NC.