Discussed the basic principle of measuring residual stress with the magnetically physics approach detailedly and put forward the magnetically anisotropy method for measuring the residual stress in the steels.In order to testify the veracity of the method,the author compared the data of residual stress in the steels detected by the magnetism physics with the ones detected by the strainflakes,and we got a satisfied result.This method is a brand-new magnetism stress detecting approach.Both the experiment and t...