A low-wear screw structure including: a screw head comprising a top and a neck extending from the top and tapering away from the top; a rod body extending from the neck of the screw head, wherein the rod body comprises a rod extension part connected to the neck, a reaming part connected to the rod extension part and a taper part connected to an other side of the reaming part, wherein the rod extension part is provided with a first bottom diameter, and the reaming part is provided with a second bottom diameter; a first thread annularly arranged on an outer peripheral surface of the rod body at a distance from the taper part to the rod extension part through the reaming part; and at least a crushing rib, the crushing rib being arranged on the outer peripheral surface of the rod body at the reaming part, each crushing rib being provided with a first side surface and a second side surface; wherein the first thread is provided at the reaming part; a first included angle (α1) is formed between the first side surface of each crushing rib and the outer peripheral surface of the rod body at a cross section of the crushing rib and the rod body, a second included angle (α2) is formed between the second side surface of each crushing rib and the outer peripheral surface of the rod body at a cross section of the crushing rib and the rod body, and the first included angle (α1) being different from the second included angle (α2); characterized in that the first thread provided at the reaming part is provided with a plurality of sawtooth cutting edges at an outer periphery, wherein a diameter width of the first bottom diameter of the rod extension part is different from a diameter width of the second bottom diameter of the reaming part, and the diameter width of the second bottom diameter is greater than zero and smaller than the diameter width of the first bottom diameter. a screw head comprising a top and a neck extending from the top and tapering away from the top; a rod body extending from the neck of the screw head, wherein the rod body comprises a rod extension part connected to the neck, a reaming part connected to the rod extension part and a taper part connected to an other side of the reaming part, wherein the rod extension part is provided with a first bottom diameter, and the reaming part is provided with a second bottom diameter; a first thread annularly arranged on an outer peripheral surface of the rod body at a distance from the taper part to the rod extension part through the reaming part; and at least a crushing rib, the crushing rib being arranged on the outer peripheral surface of the rod body at the reaming part, each crushing rib being provided with a first side surface and a second side surface; wherein the first thread is provided at the reaming part; a first included angle (α1) is formed between the first side surface of each crushing rib and the outer peripheral surface of the rod body at a cross section of the crushing rib and the rod body, a second included angle (α2) is formed between the second side surface of each crushing rib and the outer peripheral surface of the rod body at a cross section of the crushing rib and the rod body, and the first included angle (α1) being different from the second included angle (α2); characterized in that the first thread provided at the reaming part is provided with a plurality of sawtooth cutting edges at an outer periphery, wherein a diameter width of the first bottom diameter of the rod extension part is different from a diameter width of the second bottom diameter of the reaming part, and the diameter width of the second bottom diameter is greater than zero and smaller than the diameter width of the first bottom diameter.