The handling method applied to axle counter fault directly affects the train operation efficiency in the CBTC system,whereas the existing handling scheme for axle counter fault has disadvantages as low-efficiency,limited application scenarios.This paper introduces the Always Report Blocking (ARB) status in subway lines and proposes the logic of judging axle counter section as ARB status in the CBTC system.Combined with train operation scenarios,the impact of ARB status on subsequent trains’ operations is analyzed.The HITL simulation results show that the trains’ running time in the fault section is reduced by about 30% with the proposed scheme,which significantly improves the train operation efficiency and provides a scientific basis for the formulation of urban rail transit trains operation mode on ARB status lines.