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The walking section online monitoring system is an online real-time monitoring device developed to ensure the operational safety and quality of urban rail vehicles and to assess the health status of components. Compared with the axle temperature monitoring system, it can detect component abnormalities at the early stage of failure, improve operational safety, timely maintenance to improve the operating environment of components, and extend the service life of components; solve the problems of unclear status of bogie components, no health status data, and no system intelligent operation and maintenance support data. The system uses a multi-parameter diagnostic mechanism combining temperature, vibration and shock monitoring and an expert system to comprehensively monitor the status of key components of the train's travel section, typical rail damage track status, derailment monitoring, and vehicle running quality.