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A new method for quantitatively evaluating the alignment degree ofsintered Nd-FeB magnets by x-ray diffraction spectra has been proposed. It has been experimentally revealed that the strong (105) reflection existing in almost all x-ray diffraction spectra of sintered Nd-FeB magnets stems from the misalignment grains whose easy axes are at an angle of 15.5° with respect to the orientated direction of the magnet.