Method for improving the magnetic performance of a sintered NdFeB laminar magnet

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A method for improvement of a magnetic performance of sintered NdFeB lamellar magnet includes the following steps. A powder containing rare earth elements is to be coated on a surface of the sintered NdFeB lamellar magnet to form a top coat. After that, proceed with diffusion treatment and aging treatment to make rare earth elements as contained in the top coat come into the sintered NdFeB lamellar magnet. The powder containing rare earth elements belongs to the mixture of powder of rare earth oxide and hydrogen storage alloy hydride.