本文讨论了应力磁测法中标样“零应力”认定的不确定性和标样与实测件在材料组织结构上的差异对标定准确的影响，探讨了提高磁测标定准确性的措施。 This paper discusses the uncertainty of the “zero stress” determination of the sample in the stress magnetic measurement method and the difference in the material structure between the standard sample and the measured piece, and discusses the measures to improve the accuracy of the magnetic measurement calibration.