Abstract: Taking Suzhou Rail Transit Line 5 as an example, based on the need to flexibly adjust the traffic routing in the case of power failure in the power supply partition, the optimization setting scheme of main line catenary power supply partition insulation anchor section at stations with a single crossover line and a turn-back line is analyzed, as well as the feasibility of the scheme. The optimization scheme can realize the flexible adjustment of traffic crossings in the case of power failure in the power supply partition, reducing the impact of faults on operation.