The invention relates to a device for separating iron filings mixed into nonmagnetic materials, in particular to a magnet frame for removing the iron filings from plastics. The magnet frame for removing the iron filings from the plastics comprises a frame body and supporting legs, and is characterized in that the frame body is a guard ring with an upside opening and an underside opening; placement plates which are used for laying magnetic rods and provided with placement holes are uniformly distributed on the surfaces of at least two plates which are vertically and fixedly arranged in the guard ring; and one side of the guard ring is provided with a movable door. The magnet frame has the advantages of simple structure and convenient use. With the structure, a plurality of magnetic rods are orderly arranged in layers, the magnet frame can fully adsorb the iron filings and can effectively prevent the magnetic rods from violently colliding with other objects, thereby protecting the magnetic rods, prolonging the service life of the magnetic rods, lowering production cost, reducing influence on the flow direction of the objects, guaranteeing blanking progress and improving production efficiency. In addition, as the joint part of the guard ring and the placement plates is fixedly provided with a transitional arc plate so as to eliminate dead angles, the magnet frame is easy to clean.