Recycling electronic waste, such as NdFeB magnets, presents a sustainable solution to address the supply chain challenges of rare earth elements (REEs). This study aimed to: . develop and optimise a non-corrosive, efficient deep eutectic solvent (DES)-based leaching process for NdFeB magnet waste . selectively extract Nd from NdFeB magnets to produce a high-purity Nd oxide product. The impact of pretreatment on leaching efficiency was thoroughly investigated. Selective REE leaching was achieved from roasted material using a 1:1 ratio of choline chloride to malonic acid DES. This DES demonstrated the highest selectivity, with 91 per cent Nd leaching, 92 per cent Pr leaching, and only 2 per cent Fe leaching at 80C with a solid-to-liquid ratio of 1:50 over 6 hrs. The leached Nd2Os was extracted from the DES via stripping with oxalic acid, followed by oxidative roasting, resulting in a purity of over 99.5 per cent, suitable for NdFeB magnet production. Furthermore, Density Functional Theory calculations revealed that the interaction between choline chloride and malonic acid leads to an energy decrease of 35.37 eV, indicating the formation of hydrogen bonds and the synthesis of the DES. This process provides a highly efficient and environmentally sustainable method for recovering REEs from magnet waste, positioning it as a promising approach for future industrial applications.