Abstract: In this article, low-temperature selective catalytic reduction (SCR) reaction of NO on carbon nanotube-supported vanadium (V₂O₅/CNT) catalysts was carried out. When compared with activated carbon as a support catalyst, carbon nanotubes with low load of V₂O₅ show excellent catalytic activity than that of activated carbon, and the catalytic activity of V₂O₅/CNT catalysts increases markedly in the presence of SO₂. The transient reaction experiment shows that the reaction of VV₂O₅/CNT catalyst for lowtemperature SCR of NO follows the mechanism of Eley-Rideal, namely by the reaction between the adsorbed NH₃ and NO in the gaseous or a weakly adsorbed state.