As the increase of automobile,it is becoming more and more serious in air pollution caused by automobile emission.To eliminate the harmful substance in the emission,there are two main measures to take.First,to improve the engine,that is,improve the purifying condition in the engine itself.Second,installing a catalytic reactor in the emission outlet,to purify the emission.Our automoble emission purifier is using platinum, palladium, rhodium and other precious metals or thulium oxide for catalyst,and coat in the carrier of honeycomb ceramic,then install it into the exhaust system in the engine.By virtue of catalytic burning principle,the HC、CO、NOx in the emission can be purified to nontoxic H2O,O2 and CO2.It has been tested that the product performance has reach the European II Emission standard in international level.