Abstract: Aiming at the gas problem of adjacent seams in low permeability and high gas coal seam group, based on key stratum theory of strata control, the gas extraction action principle of strike high-bleeding roadway was discussed, and then key technology of gas extraction through strike high-bleeding roadway was studied theoretically. The results showed that rational layer of strike high-bleeding roadway could be determined by analyzing fracturing order of key strata according to interval of roofing breaking, the projective distance along tendency between strike high-bleeding roadway and return airway depended on pressure-relief angle and the width of "O-shape" circle, and false-inclined high-bleeding roadway could be used in gas extraction of adjacent seams. A case was studied in No.5 mine by recording data of gas emission of ventilation, gas extraction and gas emission of total quantity during beginning mining, the result showed that gas was controlled well during beginning mining by applying key technology of gas extraction through strike high-bleeding roadway, stable extraction rate reached 95%.