The invention discloses a method for processing slash marks on the surface of a pseudo-classic board. According to the method, the slash marks are processed by a method for simulating artificial cutter jumping by using a device for processing the slash marks. The device for processing the slash marks comprises scrapers, swing frames, cylinders and a conveying mechanism; the swing frames are driven by changing the ventilation sequence and air pressure of rod cavities on the cylinders to swing, so that the scrapers process the slash marks on the upper surface of the board, the mechanized processing of the slash marks on the surface of the pseudo-classic board is realized, and the processing efficiency is improved; and the depths of the slash marks, the lengths and separated distance of slash mark areas and the distribution of the slash marks in the width direction of the board can be regulated, so that the processed slash marks are irregular, and an emulation effect of manual operation is achieved. The device for processing the slash marks is simple in structure and low in manufacturing cost; and the surface of the board processed by utilizing the device for processing the slash marks is good in pseudo-classic effect, the production efficiency is improved, and the production cost is reduced, so the method and the device for processing the slash marks can be widely applied to the processing and manufacturing of the surface of the pseudo-classic board.