Abstract: Normally, the axle counter failure will not affect the train operation in CBTC mode. But in specific conditions, it will lead to turnout switch failures in the fault area, train route arrangement failures, train operation failures in CBTC mode or Intermittent ATP mode, and cause serious impact on operational service. Through in-depth study and analysis of the relationship between specific conditions and axle counter failures, and referring to the real situation of the existing system, an optimization scheme is put forward for minimizing the impact of axle counter system downtime failure.