The concept of generalized train is proposed for the decomposition of reconnection in the station. According to the concept of reconnection decomposition train contained in the generalized train proposed in this paper, the reconnection decomposition is successfully integrated into the operation plan of the station-to-departure line. At the same time, a method for judging the route conflict of the reconnection decomposition train is proposed, So that the reconnection decomposition train fits the necessary constraints for the use of the departure line. Finally, taking the train schedule data of Beijing South Railway Station in a certain period of time as input, the model successfully obtains the application scheme of the arrival and departure track considering the decomposition of reconnection and the operation scheme of the arrival and departure track without considering the decomposition of reconnection., And calculate the utilization rate of Beijing South Railway Station to arrival and departure track under these two scenarios. The results show the effectiveness of this method.