Abrasive wear is a major mechanism that affects the service lives of machines.For the ploughing wear mechanism,the wear debris was modeled respectively with spherical and the likely fractal debris,and abrasive wear was divided into three processes:pressing,sliding and crushing.With the finite element software ANSYS,the Mises stress and shear stress distribution and their changes with the depth of the surface increasing were studied,and analysis results of the two models were compared.The results demonstrate that,in the spherical model,the distribution of Mises stress and shear stress at the contact area between the debris and the contact surface is more dispersed,and the stress peak value is smaller,and neither the abrasive debris nor the contact surface is crushed;however,in the fractal model,the distribution of Mises stress and shear stress at the contact area between the debris and the contact surface is more concentrated,and the corresponding stress peak value is higher,and the debris and the contact surface are both crushed.For the two models,the fractal shape of abrasive particles constructed with fractal method is more similar to the actual shape of the wear debris.