The invention discloses a breaking hammer which comprises a guide rail, a rotation driving mechanism, a
cushion block, a
cushion block groove, a thin-wall support, a circular plate support, a cuttingmotor, a
cutting motor support, a supporting plate, a second gear, a first
bevel gear, a driving shaft, a
drill rod, a
drill rod sleeve, two first
drill rod spring supports, drill rod springs, seconddrill rod spring supports, drill rod guide blocks, a drill rod sleeve sliding hole, spring pins, a second
bevel gear, a first belt wheel, a third gear, a first rotating shaft, a second belt wheel, a fourth gear, a first
cutting wheel, a second rotating shaft, a second
cutting wheel, a hydraulic supporting ring and hydraulic rods. The drill rod sleeve sliding hole is formed at a lower position in the drill rod sleeve and penetrates the whole drill rod sleeve, the first drill rod spring supports are symmetrically mounted on the drill rod sleeve and positioned on the upper side of the drill rod sleeve sliding hole, the drill rod guide blocks are symmetrically mounted in the middle of the drill rod, one second drill rod spring support is mounted on each drill rod guide block, the drill rod ismounted inside the drill rod sleeve, and the drill rod guide blocks are matched with the drill rod sleeve sliding hole.