Objective:To observe the effects of continuous sugar monitoring system(CGMS) association with insulin pump (continuous subcutaneous insulin infusion,CSII) to treat type 2 diabetic mellitus patients. Methods:CGMS or finger blood (capilary blood glucose) 8 times per day was used to monitor and guide the insulin pump to treat diabetic patients,and then the treatment effects of patients were compared between the finger blood(capilary blood glucose) group and CGMS group. Results:The time of blood glucose becoming normal in CGMS group was significantly shorter than finger blood group,sever hypoglycemia occurred less in CGMS group than in finger blood group. Conclusion:Using CGMS association with CSII to control blood glucose was safer and faster than using finger blood to monitoring blood glucose group.