The invention discloses a drilling device. The drilling device comprises a workbench; a buffer device is arranged on one side of the workbench; the upper portion of the buffer device is connected witha motor; the front end of the motor is connected with a drill; a first cylinder is arranged on the side, away from the buffer device, of the workbench; the first cylinder pushes a baffle to move towards the drill; the buffer device comprises a round pipe supporting leg with a notch; a frame is arranged around the supporting leg; and the drilling device is simple in structure.