Abstract: Objective To analyze the monitoring results of key occupational diseases and workplace occupational hazard factors in a district of Chengdu City from 2021 to 2023,master the health level of workers and the exposure of hazard factors within the jurisdiction,assess the risk of major occupational diseases,and provide a theoretical basis for formulating and improving the prevention and control strategy of key occupational diseases in the jurisdiction. Methods The declaration information of enterprises with key occupational hazard factors,the occupational health examination cases of workers,and the field monitoring data of occupational hazard factors in the workplace in a District from 2021 to 2023 were collected through the relevant monitoring system. Excel software and R4.3.2 software was used to organize and summarize the data and statistical analysis. Results From 2021 to 2023,425 enterprises with key occupational disease hazard factors were monitored in a district of Chengdu City,and 17 926 exposed workers were monitored. 29 105 workers received occupational health examination,there were three cases of new occupational diseases,and there was no statistically significant difference in the detection rate among different years. The detection rate of suspected occupational diseases was 0.06%,the difference in the detection rate between different years was statistically significant（P<0.05）,and the annual change showed a downward trend. The detection rate of occupational contraindicated syndrome was 0.72%,and the detection rate of abnormal special examination indicators was 6.48%. There were statistically significant differences in both detection rates among different hazard factors and different years（all P<0.05）,and both showed an obvious downward trend. The qualified rate of posts in active monitoring enterprises for key occupational hazard factors in workplaces was 91.91%,while the qualified rate of points was 90.69%,and only noisy posts and points exceeded the standard,but the difference was statistically significant in the qualified rate of noisy posts among different years（P<0.05）,and the annual change showed an upward trend. Conclusion The situation of occupational disease prevention and control in a district of Chengdu City has improved in the past three years,but it is still necessary to strengthen the control of workplace noise hazards,urge enterprises to actively carry out occupational hazard project declaration,and increase the frequency of occupational health monitoring for workers exposed to key occupational hazard factors to prevent the occurrence of key occupational diseases within the jurisdiction.

Key words: Key occupational disease, Monitoring, Risk assessment