Abstract: In this paper, the turn back mode, turn back steps and train end changing mode at the terminal are described. A full automatic turn back control method is introduced, which solves the problem of manual terminal change of vehicle after the traditional turn back process when the train arrives at the terminal, it needs to switch the onboard ATC (automatic train control) main control in order to continue the operation. The realization of the full automatic turn back method is explained in detail combined with practical cases. Practice has proved that the discussed method can complete the automatic turn back efficiently, reduce the time of manual switch at the front end of the train, and improve the turn back efficiency.