Abstract: The effects of different grazing methods on the fluxs of carbon dioxide （CO2） and methane （CH4） were measured to estimate source or sink of greenhouse gases in desert steppe, in order to forther provide theoretical reference to formulate reasonable grazing system. This experiment was foeused on different grazing treatments （sheep grazing alone SG 15 sheep; tufty cattle grazing CG 3 head of cattle; both cattle and sheep MG 15 sheep and 3 cattle; no grazing CK） to research and analysis soil atmospheric fluxes of CO2 and CH4 using static chamber gas chromatography method from Jun to September 2016 in XiLaMuRen desert steppe. The resuhs showed that the soil of the desert steppe was the CO2 source and the CH4 sink. There were not significant effects of four grazing treatment on soil CO2 emissions, and CO2 flux order is CK〉CG〉SG〉 MG. Grazing treatments affected the soil CH4 flux significantly, and order is MG〉CG〉SG〉CK, indicating MG is benefit for reducing greenhouse gas emission.