The utility model provides a compound castingin power shovel bucket tooth belongs to wear -resisting power shovel bucket tooth technical field. The utility model discloses a cermet rack, the 2nd cermet rack and potassium steel or alloy steel tooth base, potassium steel or the anterior intermediate position of alloy steel tooth base are equipped with the recess, the front portion of potassium steel or alloy steel tooth base is inlayed and is had a cermet rack, it has the 2nd cermet rack all to inlay in the anterior both sides of potassium steel or alloy steel tooth base and the recess. The utility model discloses including the cermet body and potassium steel or the alloy steel base member most advanced at the bucket tooth and bucket tooth both sides surface of distributing among the compound castingin bucket tooth structure. Cermet rack material is steel knot carbide. Crisscross arrangement form is taked in arranging of the cermet body, has not only improved the wearability of bucket tooth but also has saved wear -resistant material's quantity for the cermet body is combined closely with the substrate, and the life of power shovel bucket tooth improves two to three times.