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Provided are a heavy rare earth-free high-performance neodymium-iron-boron permanent magnet material and a preparation method therefor. The preparation method comprises : providing an anisotropic magnet material, the chemical formula thereof being (Nd, Pr)xFe(100-x-y-z)ByMz, in which 28.5%≤x≤29%, 0.86%≤y≤0.92%, and 0
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