Fractured bolt withdrawing device

The invention relates to a fractured bolt withdrawing device which comprises an electric drill, a drill bit, a withdrawing rod and a positioning sleeve, wherein the outer diameter of the positioning sleeve is matched with the inner diameter of a threaded hole; the inner diameter of the positioning sleeve is matched with the outer diameter of the drill bit; the positioning sleeve is arranged in the threaded hole; the drill bit passes through an inner hole of the positioning hole to drill out a central hole in a to-be-withdrawn fractured bolt; one end of the withdrawing rod is in the shape of pyramid; the other end of the withdrawing rod is rectangular; and the pyramid-shaped end of the withdrawing rod is knocked into the central hole in an interference mode. According to the fractured bolt withdrawing device, the withdrawing rod is only needed to be knocked into the drilled hole of the to-be-withdrawn fractured bolt, and moment of force, reverse to a bolt screw-in direction, is applied to the withdrawing rod,