The invention discloses a wear-resistant SCR (Selective Catalytic Reduction) denitration catalyst and a preparation method thereof. The wear-resistant SCR denitration catalyst comprises the following main components in parts by weight: 80-90 parts of titanium dioxide, 0.5-3 parts of vanadium pentoxide, 3-7 parts of tungsten trioxide, 1-5 parts of aluminum oxide and 3-8 parts of silicon dioxide. The preparation method comprises the following steps of: (1) adding aluminum isopropoxide into a nitric acid solution to prepare hydrated alumina sol; (2) uniformly and dryly mixing the titanium dioxide powder, ammonium metavanadate powder and ammonium metatungstate powder, then adding the hydrated alumina sol, deionized water and oxalic acid, and mixing and stirring the mixture; (3) adding silica sol into the material obtained in the step (2); (4) uniformly mixing the material obtained in the step (3), and then, adding a structure promoter; and (5) extruding the material obtained in the step (4), and drying and roasting the carrier blank. The wear resistant property of the wear-resistant SCR denitration catalyst disclosed by the invention is improved by 20-40%, and the service life of the catalyst is prolonged.