Abstract: A sideline test study on catalytic oxidation of waste gas discharged from the calcining furnace of a molecular sieve company was carried on. The removal effect of hydrocarbons, nitrogenous VOCs and carbon monoxide under different reaction temperatures and catalyst bed space velocities was studied, focusing on the production of nitrogen oxides under different test conditions. The results show that under the action of catalyst, the catalytic oxidation technology can effectively remove the non-methane hydrocarbons, carbon monoxide and nitrogenous VOCs and other harmful components at low temperature 275 to 325 ℃. The pollutants removal rate can be more than 95%, and the NO_x emission can reach the national standard.