Abstract:Objective To explore the clinical and electrocardiographic features in patients with diabetes mellitus. Methods ECG data of 80 cases with diabetic were analyzed, ECG data of 80 healthy subjects of gender,age matched as control. Results Abnormal ECG 33 cases(41%)in diabetic patients and 8 cases(10%)in normal control group,there is significant difference in two groups(P <0.005). Diabetic patients with ECG changes to ST-T change,painless myocardial infarction and arrhythmia mainly. Conclusion There was a higher incidence of abnormal ECG in diabetic patients,and in females than in males,more performance for the ST-T change,painless myocardial infarction and arrhythmia.