This article is mainly to study the frictional contact performance of biomimetic flexible pits surface of different structure under the preload using the coupled bionic technology. And using finite element analysis software to conduct the contact analysis of bionic pit surface of different sizes, establish bionic flexible pit surface and rigid surface friction contact, discussion force and deformation of the surface of a flexible pit when bionic flexible pit surface and the rigid surface contact, and analyze the wear resistance. The results showed that the model of 1mm radius of pit has minimum equivalent stress, longest life and best wear resistance. Index Terms: finite element analysis, bionic, rigid -flexible contact, frictional contact, wear-resistant