Screw

The utility model relates to a screw. The screw is characterized in that an auxiliary area is arranged between any two screw threads and is provided with a cutting section connected with one of the two screw threads and a chip discharging section which is arranged between the cutting section and the other one of the two screw threads and is used for discharging chips, wherein the cutting section is provided with a plurality of ratchet teeth which are in different-angle arrangement with the screw threads. Therefore, in the locking process, wood-fiber chips wound on a rod body can be cut by utilizing the ratchet teeth, and simultaneously, the cut chips can be discharged smoothly by the chip discharging section along the trend, so that the cut chips can be prevented from being deposited and further causing blocking, the purposes of saving labor and preventing an article from cracking are achieved, and the conditions of breaking and the like in the locking process of the screw can be avoided.