The invention discloses a laser processing device including a device body. A laser processing cavity with a downward opening is arranged in the device body. A rotating cavity is in communication withthe laser processing cavity, and is arranged on the inner wall of the upper side of the laser processing cavity. An annular groove is formed in the inner wall of the upper side of the rotating cavity.A rotating transmission groove is in communication with the annular groove, and is formed in the inner top wall of the right side of the rotating cavity. A rotating gear is arranged in the rotating transmission groove. The rotating gear is dynamically connected with the right end of a rotating motor through a rotating shaft, and the outer surface of the rotating motor is fixedly embedded in the inner wall of the right side of the rotating transmission groove. A rotating block is arranged in the rotating cavity, and the rotating block is connected with the inner wall of the rotating cavity bya bearing in a rotating fit mode. The upper end face of the rotating block is fixedly provided with a ring gear block matched with the annular groove. The upper end of the ring gear block is connectedwith the rotating gear in a meshed fit mode.