Objective To evaluate the relationship between the heart diastolic function and pulse wave velocity in patients with diabetes mellitus.Methods Fifty-five patients with diabetes mellitus underwent echocardiogram exam,PWV,and BNP determination.Patients were divided into two groups according to the results:the group with normal heart diastolic function(n =33)and the group with abnormal heart diastolic function( n =22).Another 30 healthy volunteers served as control group.The values of PWV were compared.between the three groups.The relationship between E/E' and PWV,BNP and PWV were evaluated with correlation analysis.Results The PWV value of abnormal heart diastolic function group was significantly higher than that of other two groups.PWV was positively correlated with E/E'and BNP ( r =0.58,P ＜ 0.05 ; r =0.63,P ＜ 0.05).Conclusion PWV is associated with the heart diastolic function.PWV can serve as an important factor to predict abnormal heart diastolic function in patients with diabetes mellitus.