Coal mine support steel belt repairing device

The utility model discloses a coal mine support steel belt repairing device which comprises a concave plate, a repairing mechanism is arranged on the inner side of the concave plate, annular grooves are formed in the inner walls of the outer sides of a plurality of sets of round rollers, the outer sides of the round rollers are rotationally connected with the concave plate through first bearings, gears are fixedly connected to the outer walls of the sides of the round rollers, and the gears are fixedly connected with the concave plate. And spline grooves are formed in the side inner walls of the upper round rollers. According to the coal mine supporting steel belt repairing device, an external power source is connected into spline grooves in round rollers on the two sides of the upper portion respectively, the round rollers on the two sides of the upper portion rotate synchronously anticlockwise, the round rollers rotate in concave plates through first bearings respectively through meshing force between an up