Abstract: The key problems of the fire prevention for fully mechanized caving face passing through fault are analyzed by taking the prevention and control of the spontaneous combustion during No.108 fully mechanized caving mining passing through fault in Dashuitou Mine as an example. The shortest spontaneous combustion period of the No.108 fully mechanized caving face and each range of the spontaneous combustion "three-zone" of gob are obtained by means of coal spontaneous combustion experiments and temperature monitoring in the gob. The shortest period is 42 d, the cooling zone is less than 46 m, the spontaneous fire zone is from 46 m to 63 m and the suffocation zone is more than 63 m. The application of accelerating advance speed, reducing the air leakage of gob, grouting in the face, injecting nitrogen in the face, monitoring the gas and temperature of gob could ensure the safety production of the mine during the face passing through fault.