Abstract: The decomposition of NO was studied by using pulsed discharge corona plasma in nitrogen. The work focused on pulsed discharge corona plasma technique for NO decomposition and the effect of 13X pellets on the decomposition process. A quadrupole mass spectrometer was employed for online analysis of the reactants and products of NO plasma decomposition reaction. Experiments were conducted in a cylindrical corona reactor energized by repetitive high voltage pulses, which is a type of pin-plate reactor. All the experiments were operated under atmospheric pressure at temperature between 30oC~430oC. The gas flow rate was from 375 mL/min to 1333mL/min. When the reactor was filled with 13X pellets, the improvement of 13X on NO decomposition was studied and discussed. The effects of various parameters such as pulsed voltage magnitude, pulsed frequency, temperature of the 13X pellets, were discussed either. When the pulsed discharge condition is parallel and the temperature of 13X pellets is controlled at 200oC, the NO removal efficiency is 19.7%, much higher than 1.2% at 30oC. The highest removal efficiency can reach 35.9%.