Disclosed is a route failure warning device for train, comprising an electric controlling unit and an analysis and judging unit. Wherein, the electric controlling unit comprises a switch signal input circuit module, a signal processing module and a switch signal circuit module; the analysis and judging unit comprises an analysis and judging module of an interval non-insulation track circuit, and an open state analysis and judging module of incoming and outgoing station signal controller. The invention has the advantage that the interval device failure can be detected in time and the warning signal can be sent to the person on duty, and can reduce the parking accident caused by interval non-insulation track circuit failure or failure of signal controller abnormal closing.