Abstract： Objective To observe the fluctuations of blood glucose in type 2 diabetic patients treated by insulin hypodermic injection in different sites.Methods 30 patients with type 2 diabetes were randomly divided into three groups:abdominal,edltoid region and lateral femoral subcutaneous injection group.After half a year of insulin therapy,dynamic glucose monitoring for consecutive(71±10)hours was conducted,and(847±80)results of glucose Level were obtained.Results The average glucose had no difference in three group,but diurnal maximum and maximum fluctuation amplitude in patients of abdominal subcutaneous injection group were significantly lower than the Other groups(P＜0.05).The time percentage of glycemic fluctuations within 3.6～10.0mmol/L and diurnal minimum was higher compared to other groups(P＜0.05).Conclusion The site choice of insulin subcutaneous injection can influence the fluctuations of blood glucose in type 2 diabetes mellitus and abdominal subcutaneous tissue was the most ideal of the three subcutaneous injection sites.