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 (W1), and the reaming part is provided with a second bottom diameter (W2); 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 (W1) of the rod extension part is different from a diameter width of the second bottom diameter (W2) of the reaming part , and the diameter width of the second bottom diameter (W2) is greater than zero and smaller than the diameter width of the first bottom diameter (W1). 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 (W1), and the reaming part is provided with a second bottom diameter (W2); 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 (W1) of the rod extension part is different from a diameter width of the second bottom diameter (W2) of the reaming part , and the diameter width of the second bottom diameter (W2) is greater than zero and smaller than the diameter width of the first bottom diameter (W1). <EOS>