Abstract: In order to meet the needs of urban railways for large\|scale transportation, rapidification, public transportation, and interoperability between lines, from the perspective of feature commonality between national railway and urban rail transit, the performance characteristics and quality of the existing CTCS system is analyzed. Multi\|railway network integration scheme of train control system is studied from the aspects of dispatching and commanding system, temporary speed limit sub\|system, driving mode and trackside train control system.