Linear guide rail structure of PCB drilling machine

The utility model discloses a linear guide rail structure of a PCB (printed circuit board) drilling machine, which belongs to the technical field of PCB drilling machines and comprises a sliding rail and a sliding block, mounting holes are equidistantly formed in the surface of the sliding rail, sliding grooves are symmetrically formed in the outer wall of the sliding rail, the sliding block is erected outside the sliding rail and is arranged in a sliding manner, and the mounting holes are arranged in the sliding rail. The outer wall of the sliding block is detachably connected with a waste chip cleaning assembly through a bolt, and a heat insulation assembly is installed at the bottom of the sliding rail. The waste chip cleaning assembly comprises an air guide pipe, and air guide seats are symmetrically installed on the inner surface of the air guide pipe. The outer wall of the sliding block is detachably connected with a waste chip cleaning assembly through a bolt, the blowing end of an air guiding base on