The reuse of the regenerated braking energy has huge potential. This paper mainly focuses on the efficient usage of regenerative energy. When one train is braking, if the regenerative energy isn't absorbed by other trains, the traction supply network voltage will increase, it leads to the regenerative braking failure and the waste of regenerative braking energy. Based on the knowing and analysis of online running trains' operation conditions, the other trains' operation curve will be adjusted correspondingly, to achieve the synchronization of acceleration and braking condition. In order to analyze the adjustment principles and adjustment strategies, the model of traction supply network and the constraint conditions of running train are put forward, then simulation in the simple traction power supply system of an actual line are analyzed to verify the correctness and validity of the methods.