The utility model relates to the technical field of terminals and discloses a vehicle-mounted information terminal. The information terminal comprises an instrument and a system mainboard, wherein the system mainboard comprises a processor module, a power module, a controller area network (CAN) bus module, a wireless digital transmission module, a working station acquisition module, a radio frequency identification (RFID) module, a global positioning system (GPS) module, a wireless router module, a first protocol converter and a second protocol converter. By the information terminal, data of positions, working stations, dispatching commands, specific passing regions, trailer information, hook videos and the like of a locomotive can be acquired, stored and processed, and are subjected to web publishing through a wireless digital transmission network, so that the data can be received in places such as a dispatching room and a monitoring room in areas covered by the network, the running state of the locomotive is mastered in real time, and a great significance for improving the security level during on-site operation and the operation efficiency is made and the like.