Abstract: Coal roadway driving in outburst coal seam is one of the focus of the gas disaster control in outburst mine. Reducing gas pressure, content and transferring its loaded ground stress of outburst coal seam are the keys to solve the problem. Through the hydraulic slotting process, starting from the ground stress, using the process of hydraulic slotting to form fissures and micro- fissures in coal body, the gas in outburst coal seam is liberated and the ground stress is transferred. The field test shows that gas emission initial velocity q of coal mine borehole is reduced, S value of drilling cutting weight is reduced obviously. The month average footage of roadway is increased from 80 ~ 90 m to 90 ~ 110 m. Due to the increase of effective influence radius of hydraulic slotting drillings, the amount of boreholes construction decreases by 32.6%.