Abstract: Taking the TBTC (track-circuit based train control) system transformation of Shanghai Rail Transit Line 2 as an example, combined with the technical characteristics of urban rail transit TBTC and CBTC (communication-based train control) signaling system, an intelligent management method of interval turn-back under TBTC+CBTC dual moving block system integration is introduced. It can reliably ensure the safety of trains during the adaptive mixed operation among different systems, while effectively improve the interval turn-back passing capacity of TBTC+CBTC dual moving block fusion system during interval mixed operation.