Abstract: Objective To identify occupational hazard factors in a hazardous waste treatment and disposal center in Shaanxi Province,analyze and evaluate the current situation of occupational hazard factors in the project,and put forward supplementary measures and suggestions for the units that fail to meet the requirements of occupational health protection,so as to minimize the occupational hazard factors and protect the health of workers. Methods In December 2021,the occupational health field investigation,occupational health detection,occupational health examination and checklist method were used for comprehensive analysis and evaluation. Results The occupational hazard factors in the process of production of a hazardous waste treatment and disposal center in Shaanxi were cement dust,hydrochloric acid,sulfuric acid,sodium hydroxide,chromium and its compounds,cyanide,arsenic and its compounds,chloroform,carbon tetrachloride,hydrogen sulfide,nitrogen dioxide,carbon monoxide,benzene,toluene,xylene,ethyl acetate,butyl acetate,acetone,methanol,butyl alcohol,noise,and power frequency electric field. The detection results showed that the over standard rate was 0 among four points of dust detection,the over standard rate was 4.76% among 63 points of chemical substances detection,and the over standard rate was 16.7% among six types of job in noise measurement,while the test results of other hazardous factors were in line with the requirements of occupational exposure limits. Conclusions The hazardous waste treatment and disposal center belongs to the construction project with serious occupational hazard,and the critical control points of occupational hazards are chloroform,carbon tetrachloride,and ethyl acetate. It is necessary to strengthen the maintenance and management of occupational disease prevention measures,such as exhaust and dust removal purification in temporary storage warehouse,physical and chemical workshop,incineration workshop,solidification workshop,and improve the level of occupational health management,to safeguard the rights and interests of laborers' health.

Key words: Hazardous waste treatment and disposal, Current situation evaluation, Occupational hazards, Occupational health management