Processing method for backup degraded train to exit from operation in TIAS system

The invention discloses a processing method for a backup degraded train to exit from operation in a TIAS system, which is characterized in that a visual detection device and an obstacle detection device are additionally arranged on a train head in the running direction of the train, a second display is additionally arranged on a turnout signal machine, and real-time detection is carried out through the visual detection device and the obstacle detection device; the vehicle controller judges whether the train can run together or not according to the indicator light and the second information of the turnout signal machine, the backup degraded train does not depend on an area controller, interlocking equipment and trackside equipment any more, the vehicle has the autonomous obstacle avoidance capacity, and change of the turnout and operation of the train are not directly associated any more, so that the reliability of the train is improved. The complexity of turnout control is reduced, the cost of track construct