Full-automatic line alternating current system train washing method

The invention discloses a full-automatic line alternating-current system train washing method, which relates to the field of rail transit, and comprises the following steps: S1, switching a train washing machine to an'automatic train washing mode ', feeding back to an interlock, and feeding back to an ATS system by the interlock; s2, the train is parked before running to the train washing garage, a'train washing request 'signal is sent to the train washing machine, and train washing is started after confirmation of the train washing machine; s3, according to the different automatic train washing modes, the train is controlled to move correspondingly, and train washing is completed; s4, after the car washing machine detects that the train is not in the car washing garage, reporting to the interlock so as to arrange the train to wash again; based on the car washing machine and the signal system interface, linkage of the signal system and the car washing machine is achieved, when the state of the car washing mac