Objective To analyze the occurrence pattern and epidemiological characteristics of collective food poisoning in Shanghai from 1990 to 2022， and to provide scientific basis for the prevention and control of collective food poisoning.Methods The related information of collective food poisoning in Shanghai from 1990 to 2022 was collected， and its epidemiological characteristics and trends were descriptively analyzed.Results From 1990 to 2022， there were 767 incidents of collective food poisoning in Shanghai， with 25 367 people poisoned. The number of poisoning incidents and the number of poisoned individuals generally showed significant downward trend in general. After 2006， collective food poisoning incidence rate kept at a low level （5 cases per 100 000 individuals）. Collective food poisoning incidents in Shanghai were found mainly in June to September（63.7%，16 164/25 367）， and occurred mainly in collective canteens （46.4%，11 782/25 367）. The main cause of poisoning was cross contamination （43.8%，11 114/25 367）. The main type of poisoned food was dishes （26.4%，6 688/25 367）， and the main pathogen was bacteria（65.0%，16 491/25 367）.Conclusion The collective food poisoning prevention in Shanghai is stable and positive. In the future， efforts should be made to strengthen the monitoring and analysis of foodborne diseases， pay high attention to collective food poisoning incidents that occur during the rainyseason and summer， and focus on preventing bacterial food poisoning caused by cross-contamination.