Abstract: Objective To understand the occupational hazard factors existing in the process of automobile maintenance（mechanical repair workshop,sheet metal workshop,painting workshop） of an automobile sales service Co.,LTD in Jiaozuo City,detect and analyze the occupational hazard factors of the enterprise,and put forward relevant occupational disease protection suggestions. Methods In November 2021,the composition and dosage of raw and auxiliary materials used in the maintenance process of an automobile sales and service Co.,LTD in Jiaozuo City were investigated through occupational hygiene. Combined with the maintenance process,the occupational hazard factors in the workplace of the company were identified and tested,and the occupational disease protection measures were analyzed. Results There were 20 people exposed to occupational disease hazard factors in the enterprise,and the occupational hazard factors included electric welding fumes,grinding wheel grinding dust,talc dust,paint dust,xylene,butyl acetate,styrene,solvent gasoline,carbon monoxide,carbon dioxide,nitrogen oxides,ozone,manganese and its compounds,noise,ultraviolet radiation,butanol,isopropanol,pentane,n-hexane,n-heptane,methanol,and dichloromethane. The workshops that generate dust in this enterprise are mainly sheet metal workshops and paint spraying workshopsare mainly sheet metal workshops and painting workshops. A total of four operating positions were tested this survey,all of which met the requirements of the Occupational Exposure Limits for Hazardous Factors in the Workplace Part 1：Chemical Hazardous Factors.The workshops that produce chemical poisons are sheet metal workshops,machine repair workshops,and painting workshops. A total of eight operating positions were tested,and the structures all meet the requirements of the Occupational Exposure Limits for Hazardous Factors in the Workplace Part 1：Chemical Hazardous Factors. The L_{EX,8 h} of sheet metal position in sheet metal workshop was 82.1 dB（A）,L_{EX,8 h} of car wash position was 76.8 dB（A）,and L_{EX,8 h} of spray painting position in spray painting workshop was 78.8 dB（A）,the test results were in line with the requirements for the Occupational Exposure Limits for Hazardous Agents in the Workplace Part 2：Physical Agents. The UV radiation measurements of sheet metal workers met the requirements of Occupational Exposure Limits for Hazardous Factors in the Workplace Part 2：Physical Factors. Conclusions It is recommended that the enterprise use water-based paint instead of oil-based paint. The spray booth adopts the upper air supply and lower air exhaust method to reduce the occupational hazard factors that the workers are exposed to.At the same time,it is necessary to supervise and inspect the use of noise-cancelling earplugs at noise workplaces and noise workplaces to ensure that employees wear them correctly.

Key words: Automobile Service Co., LTD, Occupational disease, Hazard factors, Identification, Detection