Walking part monitoring system

The utility model discloses a running gear monitoring system which comprises a train control center, a head car system and a middle compartment system, and the head car system comprises a running gear monitoring host, a first vehicle-mounted switch, a first preprocessor, a first rotating speed sensor and a first axle box composite sensor. The running gear monitoring host is in communication connection with the train control center and the first vehicle-mounted switch, the first vehicle-mounted switch is in communication connection with the first preprocessor, and the first rotating speed sensor and the first axle box composite sensor are connected with the preprocessor. The middle compartment system comprises a second vehicle-mounted switch, a second preprocessor, a second rotating speed sensor, a second axle box composite sensor, a gearbox composite sensor and a motor composite sensor, the second vehicle-mounted switch is in communication connection with the first vehicle-mounted switch, and the second prepr