Abstract: To reduce the impact of passengers’accidental unlocking of the subway train doors on the operation organization,four different conditions for optimizing the emergency unlocking function of the door were proposed.Subsequently,the hardware composition and electrical logic of this design were elaborated,and the passenger emergency unlocking and driver operation procedures were further introduced.Taking a certain type of subway train as an example,the good effect of applying the emergency unlocking request for the train doors was introduced.This design has a good references significance for the door design of subway trains.