The lifting electromagnet made of hard magnetic materials in the lifting industry is a new type of lifting electromagnet, called permanent magnet lifting electromagnet. It fully utilizes the characteristics of permanent magnets and combines practical usage requirements. With its magnetic energy products, it can maintain the retention time of the sucked object for a considerable period of time, safe and reliable, and can eliminate the possibility of personal injury or equipment accidents caused by power failure or other electrical faults that cause the sucked object to fall. The excitation coil is only used to change the polarity of magnetic materials and achieve the basic action program of absorbing and releasing materials. The entire action can be completed in just a few seconds or even a fraction of a second. This operation consumes very little electricity, and can save over 95% electricity compared to lifting electromagnets made of soft magnetic materials. Therefore, it is a very ideal and festive variety. However, permanent magnet lifting electromagnets also have their limitations. They are not suitable for handling waste because they are dispersed and dispersed. When handling waybills, steel plates, and various profiles and billets, their temperature should not exceed 300 ℃.