Objective To investigate furnctional gastrointestinal diseases(FGIDs) in armed police on stand guard and on duty, the incidence and related factors, thereby taking appropriate prevention and treatment measures. Methods A questionnaire was designed according to FGIDs Rome III classification and diagnosis standard, for epidemiological survey of sentry duty soldiers in armed police forces. Results (1) Of 520 examined , the total number of patients with FGIDs was 131, the total incidence rate was 25.19% (131/520). The prevalence of irritable bowel syndrome was the highest (13.27%), others were functional dyspepsia (6.54%), functional constipation (5.58%), functional heartburn (3.27%), functional abdominal distension (3.26%), functional abdominal pain syndrome (3.08%), chronic anal pain, gallbladder and Oddi,s sphincter dysfunction incidence is low, less than 1%; The FGIDs incidence ranking in the top three were functional bowel disorders (23.26%), functional gastroduodenal diseases (18.85%), and functional esophageal diseases (5.57%). (2) Among 131 patients with FGIDs, those having sleep disorder accounted for 52.67%, psychological disorder accounted for 46.56%, compared with the non - FGIDs group, the differences were statistically significant (P<0.01); those having bad eating habits accounted for 29%, higher than the FGIDs fighter group, but the difference was not statistically significant (P>0.05). By comparison ,there were no significant differences in age, blood group, educational level, family history, and ethnic groups (P>0.05). (3) Of 131 patients, 52 developed two or more than two symptoms, overlapping rate of FGIDs symptoms was 39.7% (52/131). Conclusions In armed police on stand guard and on duty, overall incidence of FGIDs is higher than that in general population. Sleep and mental disorders are associated with FGIDs.