Abstract: Catalyst is the key to the selective catalytic reduction (SCR) of NOx, and its catalytic performance directly affects the removal effect of NOx. A review of deNOx catalysts in recent years, including noble metals, metal oxides, molecular sieves, carbon-based catalyst was presented. Several new catalyst, which involve carbon nanometer materials (CNTs) catalysts and solid heteropoly acids catalysts were introduced. The catalysts, which use carbon materials as support and solid heteropoly acids catalyst show outstanding low temperature activity, strong thermal stability and high deNOx efficiency, with promising industrial application. At last, some useful comments about the future directions of research were amde.