Abstract: In order to further reduce the pollutant concentration of exhaust gas from cremators,the emis-sion characteristics of pollutants were analyzed,and the effect of cremation duration on the concentra-tions of pollutants was studied through experiments. The results show that the combustion process in thecremator was affected by many factors. The parameters fluctuate greatly and the combustion stability ispoor. Thus the pollutant concentration of exhaust gas fluctuates greatly. For the conventional purificationprocess,the concentrations of dust,SO2,HCl,Hg,blackness and dioxin can meet the requirements ofthe emission standard of air pollutants for crematory ( GB 13801—2015) by extending the incinerationtime and optimizing combustion conditions of the cremator. When the cremation duration was more than45 min,the pollutant concentration of exhaust gas are well controlled,and the concentrations of SO2,NOX and CO are reduced to 8,140,and 71 mg /m3. Close-