Non-thermal plasma technology is one of the most important gaseous organic pollutant treatment technologies.A new non-thermal plasma technology（corona discharge radical shower technology）was used to study benzene decomposition with the following results.Benzene was readily decomposed with the radical shower technology.The decomposition products were CO2 mainly，but a small amount of CO was generated.Increasing energy density and relative humidity of additional gas could improve the CO2/COx ratio and the extent of decomposition.With 21 W·h·m-3 energy density and 80% relative humidity of additional gas，the CO2/COx ratio and COx generation rate could reach 84.6% and 78.5%

respectively.The benzene decomposition process involved electron dissociation reaction，radical reaction and ion reformation reaction.Moreover，radical reaction was the most important.