对三起CO2 急性中毒事故进行调查 ,并对每起事故中CO2 产生的原因进行详细地分析 ,虽然产生CO2 的原因各有不同 ,但只要增强安全保护意识 ,不违章操作 ,这类事故是完全可以避免的。提出了相应的预防措施。 Three cases of CO2 poisoning were investigated and the causes of CO2 generation in each accident were analyzed in detail. Although the causes of CO2 generation were different, as long as they enhanced the awareness of safety protection and did not violate regulations, such accidents were complete avoidable. Put forward the corresponding preventive measures.