Objective To evaluate the effectiveness of the monitoring-intervention-assessment model in workplaces where workers were exposed to silica dust, in order to provide scientific evidence for dust control in related work environments.

Methods From 2021 to 2023, 19 enterprises in a district of Shanghai involving silica dust operations were intervened according to the management of the monitoring-intervention-assessment model. Through a one-year comprehensive intervention, the changes in silica dust concentration in the workplace, the improvements in occupational health training, the work on occupational health examinations, and the implementation of occupational health management systems in these enterprises were investigated.

Results After applying the monitoring-intervention-assessment model, the concentration of silica dust in the workplace decreased significantly, with the rate of compliance with OELs increasing from 62.12% （41/66） to 83.33% （55/66） （P < 0.01）. The participation rate in occupational health training and occupational health examinations of workers exposed to dust increased from 81.18% （591/728） and 83.68% （609/728） to 98.30% （751/764） and 99.48% （760/764） after the intervention, respectively （both P < 0.001）. The implementation of occupational health management systems in enterprises also improved to varying degrees. The proportion of enterprises conducting occupational health examinations, effectively managing dust control facilities, and workers wearing dust masks correctly increased from 68.42% （13）, 47.37% （9）, and 63.16% （12） before the intervention to 100% （19）, 89.47% （17）, and 97.47% （18） after the intervention, respectively （all P < 0.05）.

Conclusions Implementing the monitoring-intervention-assessment model can effectively improve the occupational health management of enterprises and enhance the working environment quality in workplaces with silica dust operations.