Railway vehicle data communication method and device and related equipment

The invention discloses a data communication method of a railway vehicle, which comprises the following steps: splitting trigger condition information acquired by a vehicle bus to obtain a plurality of data blocks; sending each data block to an information recording device through a predetermined number of current loops according to a preset time interval; when the non-trigger condition information is received, determining whether a current data block in a sending state exists in the current loop or not; if yes, after the current data block is sent completely, sending the non-triggering condition information to the information recording device through the current loop; and if not, sending the non-triggering condition information to the information recording device through the current loop.According to the method, the transmission quantity of the train information can be effectively increased, the integrity of the train information in the transmission process is ensured, later data processing is facilitated, a