Screw fixing device used after core assembly of cast axle housing core

The utility model relates to a screw fixing device used after core assembly of a cast axle housing core, which is characterized in that an axle leg core is arranged between an upper axle piece core and a lower axle piece core; and through holes are arranged in three cores after core assembly, and screws are fixed on the through holes. The core is fastened by the screws after core assembly, therefore, the problem of yielding deformation of the core is solved, the wall thickness of castings is uniform, and the rate of finished products of the castings is greatly improved.