An apparatus for shearing and breaking nonferrous castings which are materials to be crushed, comprising: first cutting tool provided in a frame which is composed of two side plates (2a, 2b) and a bridging plate; second cutting tool being opposed to the first cutting tool and being pivotally attached via a supporting shaft disposed to the frame; movable means for shearing and breaking which moves the second cutting tool; an input opening for nonferrous castings which are materials to be crushed, the input opening being formed between the upper parts of the first cutting tool and the second cutting tool; and a discharge opening having a converging shape and being formed between the lower parts of the first cutting tool and the second cutting tool, wherein the first cutting tool includes a first base plate and a first cutter unit disposed on the first base plate, and the second cutting tool includes a second base plate and a second cutter unit disposed on the second base plate, each of the first cutter unit and the second cutter unit is a cutter unit comprised of at least an intermediate cutter unit located on an intermediate stage and a lower cutter unit located on a lower stage, and the intermediate cutter units of the first cutter unit and the second cutter unit have a substantially same shape, both of the cutter units being engaged with a gap formed therebetween to provide a shearing cutter unit, and each of the cutter units being a multi-vertex cutter part formed into a multi-vertex shape by a plurality of rhombic cutting edges combined and crucial cutting edges connected to respective intersections of diagonals of the rhombic cutting edges, characterized in that the lower cutter units of the first cutter unit and the second cutter unit include a concave cutting edge and a convex cutting edge, respectively, and the concave cutting edge and the convex cutting edge are engaged with a gap formed therebetween. first cutting tool provided in a frame which is composed of two side plates (2a, 2b) and a bridging plate; second cutting tool being opposed to the first cutting tool and being pivotally attached via a supporting shaft disposed to the frame; movable means for shearing and breaking which moves the second cutting tool; an input opening for nonferrous castings which are materials to be crushed, the input opening being formed between the upper parts of the first cutting tool and the second cutting tool; and a discharge opening having a converging shape and being formed between the lower parts of the first cutting tool and the second cutting tool, wherein the first cutting tool includes a first base plate and a first cutter unit disposed on the first base plate, and the second cutting tool includes a second base plate and a second cutter unit disposed on the second base plate, each of the first cutter unit and the second cutter unit is a cutter unit comprised of at least an intermediate cutter unit located on an intermediate stage and a lower cutter unit located on a lower stage, and the intermediate cutter units of the first cutter unit and the second cutter unit have a substantially same shape, both of the cutter units being engaged with a gap formed therebetween to provide a shearing cutter unit, and each of the cutter units being a multi-vertex cutter part formed into a multi-vertex shape by a plurality of rhombic cutting edges combined and crucial cutting edges connected to respective intersections of diagonals of the rhombic cutting edges, characterized in that the lower cutter units of the first cutter unit and the second cutter unit include a concave cutting edge and a convex cutting edge, respectively, and the concave cutting edge and the convex cutting edge are engaged with a gap formed therebetween.