The invention provides abrasion-resistant agents. The abrasion-resistant agents are characterized by comprising modified inorganic fibers and nylon, the weight ration between the modified inorganic fibers and the nylon is (1-30) : 100, the modified inorganic fibers are obtained by modifying inorganic fibers through nanofiller, the weight of the nanofiller accounts for 5-40 % of the total weight of the nanofiller and the inorganic fibers, the weight of the inorganic fibers accounts for 60-95 % of the total weight of the nanofiller and the inorganic fibers, and the surface of the modified inorganic fibers is covered by poly-dimethyl diallyl ammonium chloride. The invention further provides a preparation method of the abrasion-resistant agents. The abrasion-resistant agents integrate the advantages of the nylon, the inorganic fibers, and the nanofiller, and have high abrasion-resistant performance. When the abrasion-resistant agents are added into coating, a coating film has good abrasion-resistant performance, and is protected from abrasion.