Objective To explore the effect of insulin glargine combined with carbose onblood glucose attaining standard and pancreatic β cell function of type 2 diabetic patients.Methods 70 type 2 diabetic patients were divided into observation group and control group.All the patients got fundamental treatment as diet control and physical exercise.Patients of observing group got extra treatment as using insulin glargine combined with carbose,while patients of control group got extra treatment as using premixed insulin 30R(isophane protamine biosynthetic human insulin),all the treatment lasted for 8 weeks.Results 8 weeks after treatment,the rate of reaching standard of FBG and 2h postprandial plasma glucose and glycosylated hemoglobin (95.0％,85.0％ and 77.5％) of observing group were significantly higher than those of control group (77.5％,62.5％ and 55.0％) (x2 =5.16,5.23 and 4.53,all P ＜0.05).The levels of FCP and PCP increased significantly in both groups than that of before treatment (t =2.43,2.32,2.28,2.19,all P ＜ 0.05),and the change of observation group was more obviously than that of control group (t =2.17,2.13,all P ＜ 0.05).The occurrence rate of hypoglycemia of observation group was significantly lower than that of control group(x2 =4.11,P ＜0.05).Conclusion Treating diabetic patient by insulin glargine combined with acarbose has high safety,and helps to reach the standard of FBG and glycosylated hemoglobin,reduce the incurrence rate of hypoglycemia,protect and improve the function of pancreatic 3 cell,and postpone the beginning and progress of complication.