Objective To investigate and deal with a suspected food borne disease clustering epidemic in an agritainment resort,Xindu District,Chengdu City,and analyze the causes of the epidemic and the risk factors of exposure. Methods According to the occurrence of the epidemic,field epidemiological investigation was carried out to describe the spatial,temporal and population distribution of the epidemic,analyze the suspicious factors of the epidemic,and carry out case-control study to verify the possible causes of the epidemic.A total of 54 samples from patients and agritainment resort employees of biological samples,preserved dishes,drinking water,tableware and environmental smears were collected for bacteriological and norovirus nucleic acid detection. Results There were 16 cases in this epidemic,the incidence rate was 7.8%,and 2 cases of recessive infection.16 patients were affected,all of whom shared room and board.In the case-control study,steamed crisp meat was the most dangerous food (OR=5.13,95% CI:1.23-21.36),and the risk factors of disease transmission caused by close contact with the case (OR=6.50,95% CI:1.39-30.37).Norovirus DNA was detected in 10 biological samples and 1 environmental sample. Conclusion The clustering epidemic of infectious diarrhea was caused by norovirus,which may be the result of the joint action of food borne transmission and human to human contact transmission.