NdFeB magnet with low eddy current loss

The invention provides a slotted neodymium-iron-boron magnet. The slotted neodymium-iron-boron magnet comprises a neodymium-iron-boron square magnet which is not subjected to permeation treatment, the groove is formed in the surface of the neodymium-iron-boron square magnet; and heavy rare earth slurry is arranged in the groove. The neodymium-iron-boron square magnet with the slotting structure is flexible and changeable in slotting position and easy to operate, can be applied to different products by meeting the performance requirements of all parts, can reasonably select the slotting position according to the requirements, improves the magnetic performance of different positions, and improves the production efficiency. The torque output capability is improved for high-speed operation of the motor, the loss is reduced, the magnetic steel eddy-current loss is reduced, the motor efficiency is improved, and the temperature rise of the rotor is improved. And moreover, the slotted neodymium iron boron magnetic st