Abstract:bjective To analyze the epidemiological characteristics of aggregation epidemic events of infectious diseases at primary schools，secondary schools and nurseries in Chenghua District of Chengdu from 2015 to 2017，provide scientific basis for prevention and control of infectious diseases in schools. Methods The data of aggregation epidemic events of infectious diseases at primary schools，secondary schools and nurseries in Chenghua District of Chengdu from 2015-2017 were collected, and analyzed by using the descriptive epidemiological methods. Results A total of 392 aggregation epidemic events of infectious diseases at primary schools，secondary schools and nurseries were reported in Chenghua District from 2015 to 2017，involving 2 854 patients，with an average incidence of 0.87%. 82.65% of events occurred in nurseries，13.78% of events occurred in primary schools，and 3.57% of events occurred in secondary schools.The major disease of evens in nurseries were hand-foot-mouth disease and norovirus infection，accounting for 95.37%. The major disease of evens in primary schools and secondary schools were influenza and chickenpox，accounting for 69.12%. Conclusion The prevention and control measures of intestinal diseases in nurseries and respiratory diseases in primary schools and secondary schools should be strengthened.Sensitivity to monitor need to be increased,especially at the peak of epidemic evens, so as to early intervention and timely control.We need to enhance the health education to increase the chickenpox, influenza and EV71 vaccination rates.