The theory of macro-micro two scale model obtains the micro plastic strains by using the macro-micro connecting factor,which is an effective theory to investigate the damage accumulation of the high fatigue and its failure mechanism.Based on the macro-micro theory,the evolution rule of the micro stresses and strains with plastic hardening was studied,and it solved the micro stresses and strains of the three-dimensional models by making programs,which considered the linear mixed plastic hardening.It established the 3 D finite element models,and calculated the micro stresses and strains and obtains the equivalent stress-strain hysteresis loops with linear mixed hardening.Compared with the finite element results,the effectiveness of the algorithm results is verified.