Objective   To discover the relation between smoking cessation and diabetes mellitus.

  Methods   By stratified random cluster sampling, the data was collected and established in SPSS and statistical analysis was made with Chi-square test and analysis of variance.

  Results   Among 11742 observed objectives, 3190 persons were smoking, 8203 no smoking and 336 in smoking cessation.13 didn't indicate their smoking situation.The prevalence of diabetes mellitus was 2.5%, 2.4% and 5.2% in smoking, no smoking and smoking cessation groups respectively after culling specimen who terminated smoking after suffering from diabetes mellitus.The difference was statistically significant.The standard morbidity of diabetes mellitus was 2.3%, 2.6% and 5.4% in smoking, no smoking and smoking cessation groups respectively, according to the standard proportion of age.The difference was statistically significant too.

  Conclusion   the prevalence of diabetes mellitus was higher in smoking cessation.The health effect of smoking cessation should be further studied.