Abstract: Aiming at the abnormal emission of gas in the mining of 2S01 working face in Shanxi povince, the gas emission anomaly in the working face was obtained by theoretical analysis and field measurement. The results show that there are diurnal variations and annual changes in the surface atmospheric pressure in the mining area. The maximum atmospheric pressure is in the range of 13:00 to 15:00, the maximum difference is between 3:00 and 5:00, and the maximum difference is 3.1 hPa; average annual atmospheric is winter high summer low, the maximum difference is 8 hPa. The surface atmospheric pressure in the mining area is inversely proportional to the absolute gas emission in the goaf, and the gas emission is lagging behind atmospheric pressure for 1 to 2 hours. By taking the dynamic adjustment of the negative pressure of the roof gas channel and the comprehensive technical measures for the extraction of the upper corner of the pipe, the quantity and intensity of the gas emission in the goaf area under extreme weather conditions are reduced to ensure the safe production of the working face.