The utility model discloses a human-machine interface device of train control on-vehicle equipment, which belongs to the field of railway train control equipment. The equipment comprises a main control unit, a power supply module, an indicating device, an audio device, an LCD (liquid crystal display) screen, a data maintenance interface, an input device, a first host interface, a second host interface and a switching module. The power supply module is connected with the main control unit, The main control unit is respectively connected with the indicating device, the audio device, the LCD screen , the input device and the data maintenance interface. The first host interface, the second host interface and an LED display are connected to the main control unit by the switching module. The equipment can be set to connect host computers of two train control equipment at the same time, and can realize double redundancy display, so as to solve the problems that as the present single/dual-set of DMI devices are only connected with one ATP host computer, the train control on-vehicle equipment needs to arrange a plurality of DMI devices as display devices, so as to lead large investment and inconvenient operation.