ABSTRACT
Objective@#Throughing the investigation and analysis of seven cases of acute lung injury caused by a welding operation, the hazards and production pathways of harmful gases such as phosgene and nitrogen oxides are understood, which will serve as a reference for preventing similar events in the future.@*Methods@#Throughing the accident scene environment investigation and clinical case analysis, combined with the laboratory test results, carried on the comprehensive analysis.@*Results@#The accident caused a total of 7 people to suffer from acute lung injury to varying degrees. Three of them were sent to the ICU ward for treatment due to acute respiratory failure. After active treatment, 7 people were discharged from the hospital with obvious relief.@*Conclusion@#Welding is also a kind of profession that causes the high incidence of acute lung injury accidents. It is necessary to strengthen the knowledge training and protection awareness education of welding workers to avoid the occurrence of acute harmful gas poisoning accidents.