Abstract: In this paper, the anomalies of CO emission in the 6106 fully mechanized top coal caving face in the 6 coal seam of Chuancao Gedan mine are studied.Through systematic and comprehensive analysis and research on the risk of spontaneous combustion in mined out area in this area, comprehensive measures such as pressure equalizing and ventilation on working face are adopted to control the concentration of CO below the safety value.During the mining period, the air leakage in the goaf is controlled below 1 m³/s and the wind pressure is stable between 430 Pa and 480 Pa.It ensures the stability and reliability of the pressure equalizing ventilation system, and ensures the safe production of the working face.