Abstract: Catalysis non-thermal plasma reactor has been demonstrated to be effective in improving the energy efficiency and purification for air pollution control. According to the available experimental data，for a given specific energy density，the energy efficiency for gaseous pollutant abatement obtained with catalysis non-thermal plasma reactor could be improved with 1.1—12 times as compared to that of conventional reactors depending on the type of pollutants，reactor geometry and catalyst used. The influences of reaction mechanism，reactor geometry and catalyst parameters on the performance for gaseous pollutant removal are comprehensively discussed，and the further development trend of this technology is proposed.