Objective To investigate the effect of community diabetic prevented and treated by integrated traditional Chinese and western medicine based on TCM constitution identification. Methods There were 700 patients with diabetes aged 45 to 65 by cluster sampling in community, divided into two groups:experimental group and observation group. The observation group was treated with standardized management and treatment of diabetes. The experimental group was in addition to treated with standardized management and treatment of diabetes, but also given targeted Chinese medicine health guidance and intervention based on TCM Constitution identification. The research last for one year. To observe the fasting blood glucose, 2-hour postprandial blood glucose, glycosylated hemoglobin and diabetic symptoms scale of the two groups before and after intervention. Results The fasting blood glucose and 2-hour postprandial blood glucose had significant difference before and after the intervention (P<0.01), between the experimental and observation group (P=0.001, 0.014). It had significant differences between the two groups in postprandial 2 h blood glucose by analysed of interaction comparison (P=0.002). The scores of diabetic symptoms had significant difference before and after the intervention in different groups (P<0.01). And it also had significant differences in analysis of interaction comparison (P<0.01). Before and after the intervention of diabetes symptoms curative effect index difference was statistically significant (mann whitney U=-2.302, P=0.021). Conclusions Community diabetic prevented and treated by integrated traditional Chinese and western medicine based on TCM constitution identification plays a certain role in the control of blood sugar. It can effectively improve the patient's disease symptoms. While the mechanism still need further study.