Pressure relief method of coal bed high-pressure waterpower bedding drilling and cutting

The invention discloses a pressure relief method of coal bed high-pressure waterpower bedding drilling and cutting. The pressure relief method of the coal bed high-pressure waterpower bedding drilling and cutting comprises: a plurality of drill hole positions are respectively distributed in surfaces of two sides of coal bodies and a surface of a head-on coal body in a heavily stressed concentration area of a transportation crossheading of a driving face; a hydraulic drilling rig is adopted to drill the drill hole positions, a preset dip angle is formed by the direction of drilling and a horizontal plane, and when a drill hole reaches the projected depth, the hydraulic drilling rig is stopped to drill; an end of a drill stem of the hydraulic drilling rig is connected with a jet device, and the jet device and the drill stem are both fed in the drill hole which is drilled; the hydraulic drilling rig is started to drive the drill stem and the jet device to rotate and carry out seam cutting operation, and a pressu