Abstract: In view of the problems of shallow borehole depth, low borehole-forming rate and poor gas drainage effect in broken soft coal seam, the air compound directional drilling technology based on air screw motor construction is proposed. From drilling speed, drilling pressure and air supply, the influence of air compound directional drilling parameters on drilling construction is analyzed. The field test was carried out in Qinglong Coal Mine of Guizhou Province, 13 main boreholes and 4 main branch boreholes were completed in 16^# broken soft coal seam. The boreholes above 200 m reached 94%, the boreholes above 300 m reached 75%, the maximum borehole depth was 406 m, and remarkable gas drainage effect was achieved.