提出了一种针对高速铁路动车组周转问题的优化方法，该方法在考虑动车组的检修、空车回送、重联编组等约束条件的基础上，以最少动车组运用数目为目标，对动车组周转图进行优化。首先对我国24h为周期的基本运行图进行增广操作，增广操作是指将2张单日运行图无缝拼接，形成以48h为周期的增广列车运行图。在增广列车运行图的基础上构建出动车组接续网络，并提出动车组流量模型，该模型为线性整数规划模型。最后，运用OPL语言构建模型，并将运行图数据输入模型，调用CPLEX求解器求解。计算结果表明，文中提出的优化方法可以成功解决高速铁路动车组周转问题。

An optimization approach for the circulation problem of EMUs in high-speed railway was proposed. It optimizes the circulation plan of EMUs to minimize the number of EMUs under the constraints of EMUs maintenance,empty return, and reconnection. Firstly, the basic 24-hour railway timetable of China was augmented by seamlessly splicing two single-day railway timetable so as to form an augmented railway timetable that runs on a 48-hour cycle. Then based on the augmented timetable, the EMU connection network was constructed and a linear integer programming model was put forward as the EMU train flow model. Lastly, a model was built through OPL language and the railway timetable data was entered into it, calling CPLEX solver found a solution to it. The results show that the optimization method proposed in this paper can solve the problem of EMU circulation successfully.