Abstract: Objective To understand the prevalence of foodborne disease events in Chengdu,Deyang,Meishan and Ziyang（hereinafter referred to as 'Chengdu metropolitan area'） in Sichuan Province from 2015 to 2023,and to explore the prevention and control methods of foodborne diseases in the same city,so as to provide a basis for relevant departments to formulate timely and effective policies to deal with cross-regional foodborne disease events. Methods Descriptive epidemiological analysis was conducted on foodborne disease events reported to have occurred in Chengdu,Deyang,Meishan and Ziyang in the "Foodborne Disease Event Monitoring System" from 2015 to 2023,and SPSS 25.0 software was used for statistical analysis. Results From 2015 to 2023,a total of 464 foodborne disease events were reported in the "Foodborne Disease Event Monitoring System",with 3 924 cases and 5 deaths. The most frequent occurrence of incidents occurred in households（54.96%）,and the food causing the most incidents was poisonous mushrooms（33.41%）. Among the events that identified the pathogenic factors,the number of events and the number of patients caused by pathogenic microorganisms accounted for the highest proportion. There were statistically significant differences in the distribution of the number of affected individuals,locations,pathogenic factors,and pathogenic microorganisms in each foodborne disease event among the four cities of Chengdu,Deyang,Meishan,and Ziyang（χ²=23.712,27.176,56.831,24.942, all P<0.01）. Conclusion The foodborne disease events are characterized by cross-regional,uneven distribution and inconsistent factors. The prevention and control of foodborne diseases in the "Chengdu metropolitan area" can effectively reduce the occurrence of foodborne disease events and improve the disposal efficiency.

Key words: Foodborne diseases, Prevention and control, Epidemic characteristics, Urban integration