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Abstract：Under the influence of the external environment, the train causes the defects of the hardware and software of the equipment. The defects lead to fault and affect the performance and safety of the train to a certain extent. Monitor is an essential component of train, a bridge of human-computer interaction, and a window for displaying the fault information of train equipment. Aiming at the phenomenon of false alarm and blank record of traditional train monitor, this paper designs a new method about fault information searching and analyzing based on fault code. This method greatly promotes the efficiency of train display application designers and reduces the workload of fault recording process. Based on the actual test environment, this method is tested. Results show that the method is efficient and robust for fault record of train display and, to some extent, ensures the accuracy of display the fault information.