Abstract: In view of the stop-and-removal of 21220 fully mechanized caving face in Changcun Mine, there are many residual coal in the goaf, and the air leakage is likely to cause spontaneous fire in the goaf. A series of fire-fighting technologies, such as blocking the upper and lower corners and triangular coal pillars, grouting from the top and behind the hydraulic support to increase the moisture content of the coal, injecting more glue after the hydraulic support, building several fire drill fields, changing the ventilation mode and speeding up the removal speed. It ensures that no gas anomalies occur during the dismantling of 21220 fully mechanized caving face, so that the 21220 fully mechanized caving face can be safely withdrawn.