Abstract: According to the elimination outburst needs of working face mining and tunnel driving, elimination outburst of two places with one hole technology of cluster-type multi-branch directional hole group is proposed, and the definition and basic principle, layout and construction technology is introduced. Combined with the characteristics of coal in Baode Mine, such as large thickness, hard quality, multi-layer, poor air permeability and gas pressure, the key drilling technologies are developed, such as measurement while drilling technology, drilling trajectory with drilling manual control technology, multi-branch directional hole construction technology, and the directional drilling rig, MWD system, helical screw motor, drill rod and directional drill are developed. The field test was carried out in 81309 working face of Baode Mine, 14 cluster-type multi-branch directional hole groups, 91 drilling holes, 318 branch holes were completed, the average extraction concentration was 40.71%, the average pure gas flow was 7.26 m³/min, the gas drainage rate reached 26.73%, which meets the demand of gas extraction in 81309 working face, 83109 transportation roadway and 83110 return air way. With the efficient drainage and pre-drainage of cluster-type multi-branch directional hole group, the gas in working face and tunnel would be controlled advanced.