Abstract: Nowadays，NO_x pollution becomes more and more serious ，low temperature SCR denitration technology，as a kind of new and potential denitration technology，has attract people′s attention. Gives a summary and commentary on the research status of low temperature SCR denitration catalysts and mainly introduces the scientific research status of manganese catalysts，vanadium catalysts and other metal oxide catalysts. Indicates the different types of catalyst preparation methods，carriers，and the use of different kinds of metal oxides may all have influence on the catalyst activity and the efficiency of denitrification. Meanwhile，the denitration mechanism of low -temperature SCR catalysts is introduced. At last ，elaborates the effects of water vapor and SO₂ in fuel gas on catalytic process.

Key words: NO_x, low temperature SCR denitration catalyst, denitration mechanism, metal oxide