Cement prefabricated slab suction cup

The invention relates to a cement prefabricated slab suction cup. The suction cup comprises a main body, and the main body is composed of a disciform disc body and a cylindrical rod body; an external thread is formed on the outer wall of the rod body, an inner hexagonal hole is formed in the middle of the lower end face of the disc body, a plurality of evenly-distributed round holes are formed in the periphery of the inner hexagonal hole in a surrounding manner, the centers of the round holes are located on the same circle, magnetic steel is fixedly connected with the interiors of the round holes, the thickness of the magnetic steel is smaller than the depth of the round holes, the magnetic steel is sintered nd-fe-b magnet steel, and the sintered nd-fe-b magnet steel is composed of, by mass percent, 28% to 33.5% of Nd, 1.1% to 1.2% of B, 3% to 6% of Co, 0.15% to 0.2% of Cu, 0.1% to 0.5% of Al, 0.5% to 1% of Zr, 0.1% to 0.5% of Nb, 1% to 3% of M, 5% to 10% of reinforced fibers and the balance Fe. The suction cup is convenient to use, good in suction effect and long in service life.