Abstract: In order to master the spontaneous combustion laws of 1^-2 coal seam in Liuta Coal Mine. The basic parameters of coal spontaneous combustion characteristics and index gases of 1^-2 coal seam was studied experimentally. CO can be used as the index gas of 1^-2 coal seam for early prediction of spontaneous combustion.The measurement of spontaneous combustion"three zones"of goaf for 12201 fully mechanized coal face was applied.The variation laws of concentration of CO and O₂ were mainly analyzed with respect to time and face advancing. The range of the oxidizing band of coal spontaneous comustion of 1^-2 coal seam is 48～150 m from working face to deep of goaf based on the standard of critical concentration of O₂.