Research conclusions：To the large cross section metro with function of untwining passenger flow, the mature and reliable moving-like block ATC system based on the digital track circuitnot only satisfies SIL4 safety requirement, but also meets the main technical operation indexes, such as 90s headway, 120s turnaround interval, etc. In the meantime, the safe and reliable technical interfaces can be also realized with the corresponding systems, including communications, power supply system monitoring, platform screen door system and flood gate system, etc.