Electro-permanent magnet lifting jack

The utility model relates to an electro-permanent magnet lifting jack capable of sucking, hoisting and carrying steel plates and other materials. The lifting jack comprises a magnetic conduction shell, a coil fixed in the magnetic conduction shell, a first permanent magnet group arranged outside the coil and a second permanent magnet group arranged inside the coil, wherein the first permanent magnet group is permanent magnets containing the elements of neodymium, ferrum and boron, and the intrinsic coercive force thereof ranges from 11700 to 21000 oersted; and the second permanent magnet group is permanent magnets containing the elements of aluminium, nickel and cobalt, and the intrinsic coercive force thereof ranges from 420 to 1850 oersted. The electro-permanent magnet lifting jack has advantages that the electro-permanent magnet technology is adopted, and users are free from worrying about endangering workers and equipment under the circumstance of falling of the steel plate and other materials caused by p