Based on the analysis of the shortcomings of the traditional organic waste gas treatment method of spray booth,the treatment method of direct incineration by self-concentration using circulating air in the spray booth was proposed.Firstly,the design of the direct incineration treatment plan was completed by calculating the amount of VOC generation,distribution,circulation air volume,etc.in the spray booth.Secondly,the volume fraction of organic matter in the spray booth was analyzed to verify the safety of the treatment.Finally,the exhaust gas concentration from the chimney was verified with the requirements of the local environmental protection department and relevant regulations.It provides a new design idea and reference for the exhaust gas treatment of the subsequent spray booth.