Hydraulic breaking hammer

The utility model relates to a hydraulic breaking hammer. The drilling machine comprises a mounting shell, a hydraulic cylinder arranged at one end of the mounting shell, and a drill rod arranged at the other end of the mounting shell. A piston rod connected with the hydraulic cylinder is arranged in the mounting shell; the end of the piston rod is provided with a hammer head used for making impact contact with the drill rod. A mounting groove is formed in the upper end surface of the drill rod; a buffer mechanism is arranged in the mounting groove; the buffer mechanism comprises a buffer block which is embedded and mounted in the mounting groove; an impact head is arranged on the hammer head, a plurality of abutting heads are arranged on the end face of the hammer head around the impact head at intervals, an impact hole allowing the impact head to penetrate through is formed in the middle of the buffer block, and a buffer part used for abutting against the abutting heads is arranged on the buffer block aroun