Train diagnosis method and human machine interface (HMI) system

The invention provides a train diagnosis method and a human machine interface (HMI) system. The method comprises the steps that the HMI system acquires train data; the HMI system determines the fault information of a train according to the train data and preset first diagnosis configuration files comprising a plurality of fault diagnosis logic files; and the HMI system conducts matching according to the fault information and a preset fault dictionary notebook to obtain diagnosis information corresponding to the fault information, and the fault information and the diagnosis information are displayed. According to the technical scheme, the first diagnosis configuration files used for diagnosing the faults of the train are integrated into the HMI system, so that real-time updating to a diagnosis system is achieved under the condition that the normal operation of a train control system is guaranteed, immediate diagnosis and treatment to train faults are further guaranteed, and safety operation of the train is improved.