In　order　to　make　full　use　of　the　heat　in　nonthermal　plasma　systems　and　decrease　the　generation　of　by-products,　a　reverse-flow　nonthermal　plasma　reactor　coupled　with　catalyst　was　used　for　the　abatement　of　toluene.　In　this　study,　the　toluene　degradation　performance　of　different　reactors　was　compared　under　the　same　conditions.　The　mechanism　of　toluene　abatement　by　nonthermal　plasma　coupled　with　catalyst　was　explored,　combined　with　the　generation　of　ozone　(O-3),　NO2,　and　organic　by-products　during　the　reaction　process.　It　was　found　that　a　long　reverse　cycle　time　of　the　reactor　and　a　short　residence　time　of　toluene　decreased　the　internal　reactor　temperature,　which　was　not　beneficial　for　the　degradation　of　toluene.　Compared　with　the　dielectric　barrier　discharge　(DBD)　reactor,　toluene　degradation　efficiency　in　the　double　dielectric　barrier　discharge　(DDBD)　reactor　was　improved　at　the　same　discharge　energy　level,　but　the　concentrations　of　NO2　and　O-3　in　the　effluent　were　relatively　high;　this　was　improved　after　the　introduction　of　a　catalyst.　In　the　reverse-flow　nonthermal　plasma　reactor　coupled　with　catalyst,　the　CO2　selectivity　was　the　highest,　while　the　selectivity　and　amount　of　NO2　was　the　lowest　and　aromatics,　acids,　and　ketones　were　the　main　gaseous　organic　by-products　in　the　effluent.　The　reverse-flow　DBD-catalyst　reactor　was　successful　in　decreasing　organic　by-products,　while　the　types　of　organic　by-products　in　the　DDBD　reactor　were　much　more　than　those　in　the　DBD　reactor.