Fine particle peening has become an important surface strengthening technology in the field of aviation

energy etc. because it can reduce the surface roughness while strengthening the surface of substrate due to the used small size medium. So far

the research on this technology has been still in the stage of experimental demonstration of its strengthening mechanism

and complete theoretical system has not been established yet. This article summarizes the principles

characteristics of fine particle peening technology and discusses the strengthening mechanism in the process of fine particle peening. The current research status of fine particle peening technology and its application in various materials are described. It also points out the potential application of this technology and studying the effects of various parameters on the shot peening effect will be the main direction of development of fine particle peening.