Abstract: Objective To understand the epidemiological characteristics of occupational heatstroke in Guangdong Province from 2006 to 2022,and provide a basis for improving the prevention and treatment of occupational heatstroke in the province. Methods The "Occupational Disease and Health Hazard Monitoring Information System" subsystem of the "Chinese Center for Disease Control and Prevention Information System" was used to collect relevant information on occupational heatstroke cases in Guangdong Province from January 1,2006 to December 31,2022,and their epidemiological characteristics were analyzed. Results A total of 280 cases of occupational heatstroke were diagnosed in Guangdong Province from 2006 to 2022,and the number of diagnosed cases showed an overall upward trend after 2018. The incidence population was mainly male,and the age was mainly concentrated between 40-60 years old. There was no statistically significant difference in the age distribution of onset between different genders（P>0.05）. The diagnosis months were concentrated between August and November,with the highest number of cases in September. There were a total of 270 reported cases in the Pearl River Delta region,with Dongguan,Shenzhen,Foshan, and Guangzhou ranking among the top four in terms of the number of cases. The cases were concentrated in the manufacturing industry,with 130 cases. In addition,they were more common in industries such as environmental sanitation management,labor dispatch services,residential building construction,and other cleaning services. The scale of enterprises was mostly small private companies. The report rate of suspected occupational diseases was 4.2%,and the occupational health examination rate was 12.1%. There was no statistically significant difference in the occupational health examination received by occupational heatstroke cases among gender and age groups of onset（both P>0.05）. Conclusion The reports of occupational heatstroke present a clustering of population,time,region,industry,and enterprise scale,while also indicating a lack of occupational health protection and monitoring capabilities for the occupational population. Further efforts are needed to carry out occupational heatstroke risk warning and targeted risk prevention and control measures. The monitoring,diagnosis,and treatment of occupational heatstroke should be strengthened,and the entire process of occupational heatstroke prevention and control should be improved.

Key words: Occupational heatstroke, Epidemiological characteristics, Occupational health examination