The utility model discloses a locomotive track switching device with an automatic reset function. The device comprises a switch tongue, a switch tongue slide plate, a switch tongue pulling plate, a return spring and a lateral pulling fixing plate, wherein the switch tongue slide plate is arranged at a turnout junction and fixedly connected below a steel rail; and the lateral pulling fixing plate is arranged on one end of the switch tongue slide plate and connected with the switch tongue pulling plate through the return spring, and the switch tongue is fixedly connected with one end of the switch tongue pulling plate. The device adopts an automatic return turnout junction servo mechanism, i.e. the return spring is adopted to connect the switch tongue pulling plate with the lateral pulling fixing plate, when a locomotive passes, the turnout junction is opened under the tangential component force which is generated by the running locomotive, so that the locomotive can successfully pass, and the turnout junction can then automatically reset. The manual turnout junction switching defects and unsafe factors of the prior art are overcome. The moving smoothness of the turnout junction is effectively increased due to the low friction slide plate, the wheeltrack impact force of a turnout junction transition section is reduced, the service life and maintenance-free period of the turnout junction are prolonged, power equipment does not need to be added, and the device is safe and energy-saving and works stably and reliably.