Abstract: In view of the high gas concentration in the upper corner of the high gas working face of Malan Mine, combined with the geological and mining conditions of the close coal seams, the bottom pumping alley in 9^# coal seam near 8^# coal can be used as the mining roadway after mining 9^# coal, which is not only conducive to mining-excavation replacement, but also cuts off the pressure relief gas of adjacent layer and pre-pumping the coal seam gas, and then pumping the gas in high cracks zone and the existing goaf. This technology is applied to Malan Mine 18301 working face, and achieves a good mining effect for the safety of mining face.