Abstract: In response to the problem that the existing delay determination mode of the Centralized Traffic Control (CTC) system cannot accurately grasp the delay status of trains and issue reasonable warnings, this paper combined the train scheduling business requirements and CTC system data to design an implementable train operation delay status warning mechanism, studied the delay threshold determination technology and dynamic update strategy based on static line data elements, included customizing calculation methods for delay duration according to train type and delay event location, as well as warning information push strategies based on delay event sensitivity analysis. Through experimental verification, this strategy has significant advantages in refining delay determination and rationalizing early warning information push, provides data support for delay situation deduction and helps the intelligent development of high-speed railway dispatching business.