Coal mine drilling machine supporting device

The utility model relates to the technical field of mining machinery, and discloses a coal mine drilling machine supporting device which comprises a machine body, supporting transverse rods are fixedly connected to the left side and the right side of the machine body, four rail wheels are fixedly installed at the bottom of the machine body, and the four rail wheels are located between the two supporting transverse rods. Two adjusting boxes are fixedly connected to each of the two supporting transverse rods, the bottoms of the two adjusting boxes penetrate through and extend to the inner bottomwalls of the two supporting transverse rods, transmission gears are rotatably connected to the interiors of the four adjusting boxes, and adjusting threaded rods are rotatably connected to the interiors of the four adjusting boxes. The movable threaded rod is controlled to drive the fixing rod to be close to the wheel rail, friction force between the movable threaded rod and the wheel rail is increased to achieve the bra