A screw capable of cutting and receiving dregs in drilling includes a tapered head with a head portion and a tapered neck; the tapered neck being located at a lower end of the head portion; the tapered neck having a larger upper end and a small lower end; at least one strip groove formed on a tapered surface of the tapered neck; the at least one strip groove and the tapered neck being integrally formed; and a plurality of knives formed on the tapered surface of the tapered neck and winding around the tapered surface of the tapered neck; each of the knives being located at an outer side of each said strip groove, respectively; and the knives and the tapered neck being integrally formed and the knives protruding from the tapered surface of the tapered neck.