Train running gear fault diagnosis method and train running gear fault diagnosis device

The invention discloses a train running gear fault diagnosis method and a train running gear fault diagnosis device. The method includes acquiring a train speed; adjusting shooting frequency of a camera shooting component to enable the shooting frequency to be matched with the train speed when the train speed exceeding a preset range is judged, and acquiring a train running gear image shot by the camera shooting component according to the adjusted shooting frequency; searching a standard template image corresponding to the train running gear image from a preset database, comparing the train running gear image with a standard template according to a first preset algorithm, marking different positions on the train running gear image when a comparison result indicates difference between the two, and confirming that a train has faults; displaying the train running gear image marked with the different positions. By the train running gear fault diagnosis method, quick and accurate train running gear fault diagnosis is achieved, and a great quantity of manpower and material resources are saved.