The utility model relates to a train digital broadcasting system. The train digital broadcasting system is characterized in that the train digital broadcasting system comprises a cab module and a passenger room module; the cab module comprises a microphone, a loudspeaker, a speech control box, a switch and a control unit; and the passenger room module comprises an LED display, a loudspeaker, a control unit, a switch and an emergency alarm. Compared with the prior art, the train digital broadcasting system provided by the utility model has the advantages of accurate information, low cost, high speech intelligibility and the like.