Automatic chip removal drilling wood screw

The invention discloses an automatic chip removal drilling wood screw. The screw comprises a screw head, a screw body and a screw cap which are connected into a whole from the bottom to the top, wherein the screw body comprises a screw tube inside which a duct is formed and spiral cutters which are spirally distributed on the outer wall of the screw tube from the bottom to the top; the screw head is a reverse tapered bit consisting of a plurality of arc cutting heads, which form a rotary cutting bit for rotatably cutting a wood structural member; a chip inlet is correspondingly formed between two adjacent arc cutting heads; a chip removal port is formed in the middle of the screw cap; and the ducts formed in the chip inlet and the screw tube are communicated with the chip removal port to form a chip removal channel which automatically removes the chips generated in a cutting process from the bottom to the top. The wood screw has a simple structure, is convenient to process and manufacture, has good use effect, has the characteristics of being simple and convenient in construction, high connecting strength, long screw body and the like, and can effectively solve the problems that the conventional wood screw has over-small size, the screw rod can only perform surface anchoring, the constructing process is complex and the like.