A high-efficiency and green physical method was proposed to clean the surface of NdFeB waste magnets for recycling. NdFeB regenerated magnets were fabricated by adding low-melting point Ho_63.3Fe_36.7 alloy to grain boundaries. Results show that in magnets without Ho_63.3Fe_36.7, there are insufficient Nd-rich phases to isolate the Nd₂Fe₁₄B phase, leading to poor magnet performance. With the addition of Ho_63.3Fe_36.7 alloy, the grain boundary phases become clear and concatenated. Optimal magnetic energy [(BH) _max+H_cj=1756.07] can be obtained by adding 2wt% Ho_63.3Fe_36.7 to the magnet. Further, the coercivity increases by 123 kA/m (approximately 9.1%), the maximum magnetic energy product decreases from 290.94 kJ/m³ to 281.07 kJ/m³, and remanence decreases slightly. Through analysis of the microstructure and composition, it can be seen that the (Nd, Pr, Ho)₂Fe₁₄B shell layers form at the grain boundary, which enhances the coercivity of the magnet. X-ray diffraction analysis suggests that the diffraction peak intensity ratio of magnet I₍₀₀₆₎/I₍₁₀₅₎ increases from 0.92 to 1.32, which indicates that the alignment degree is improved and the influence on remanence is weakened. Therefore, regenerated magnets can possess improved coercivity while maintaining magnetic remanence.