Abstract: In order to eliminate the coal bed methane in the low gassy mine to the safety hidden peril existed in the seam mining, a new sulphide deoxidation techni que of the coal bed methane in the low gassy mine was provided.The thermogravimetric analysis was applied to the selection of the deoxidizer and the deoxidation cata lyst.A study on the Na2S oxidation with the catalyst (a self developed catalyst) was conducted on the fixed bed reactor and the thermogravimetric experiment was appli ed to select the catalyst for the reaction from the CO reduction to Na2SO4.The study showed that taking Na2S as the deoxidizer and taking SDD as the deoxidation cat alyst, under the temperature of 180380 °C, the deoxidation of the raw material was conducted under the air velocity of 1001 90 h-1.Then under the temperature of 600 ~ 630。C, the Fe2O3 as the catalyst was applied to the CO reduction of the Na2SO4 generated after the deoxidation. The generated Na2S could be recycled for applicatio n.The Na2S deoxidation technique would have an easy operation, low temperature, no impurity air mixed and good effect.