Locomotive intelligent door

The utility model provides an intelligent door of a locomotive. The device comprises a vehicle door, a display alarm box and an electromagnetic lock arranged on the vehicle door, the display alarm boxcomprises a control host and a display slave; the control host comprises a microprocessor minimum system, a signal acquisition module and an external driving circuit; the external driving circuit controls the on-off of the power supply of the electromagnetic lock; the signal acquisition module is connected with a speed sensor arranged on a main shaft of the locomotive and a position sensor arranged in a lock hole of the electromagnetic lock; when the locomotive speed exceeds a safety threshold value; the electromagnetic lock is powered on to lock the vehicle door, meanwhile, whether the vehicle door is normally closed or not is judged by detecting whether the spring bolt stretches out in place or not, the display slave communicates with the control host, current vehicle speed information,vehicle door states and f