The invention discloses a wear-resisting gear. The wear-resisting gear comprises a body and a gear convex part fixedly connected with the body. A wear-resisting coating is attached to the surface of the gear convex part and comprises aluminum oxide, magnesium and titanium dioxide. The aluminum oxide, the magnesium and the titanium dioxide are evenly distributed in the wear-resisting coating. The wear-resisting coating is prepared from, by mass percent, 20%-40% of aluminum oxide, 10%-20% of magnesium, 5%-15% of titanium dioxide and the balance steel universal for gear manufacturing. The magnesium, the titanium dioxide and the aluminum oxide in the wear-resisting gear achieve a synergistic effect, the strength of the wear-resisting coating is enhanced, meanwhile, the fatigue resistance of the wear-resisting coating is good, and the service life of the gear can be prolonged easily; the above three kinds of materials are easy to manufacture, so that the cost for producing the wear-resisting coating is relatively low; and the wear-resisting gear is low in product manufacturing cost and can be applied to more fields.