Abstract:In the long-term use process,fretting wear and corrosion accelerate the failure of the ACSR,which causes a huge security risk.The research progress of the fretting fatigue of ACSR is reviewed.The fretting fatigue,crack initiation and propagation mechanisms and the influencing factors of ACSR are introduced.Combined with the structural characteristics and mechanical characteristics of EHV transmission line,the fatigue strength residual strength model of ACSR is deduced based on the nonlinear strength degradation model.Some problems worth further research and exploration are put forward.