Abstract: Due to the high value-added freight flow distribution does not fully match the regular train product structure, a considerable portion of high value-added goods cannot be shipped by regular train in railway network. Therefore, to reduce the turnover times for this part of the freight flow could improve its competitiveness in the transportation market. On the basis of analyzing the railway freight transportation process, the article put forward the optimization model of the railway freight adaptation chain with the targets of minimizing the turnover times for the high value-added good. The adaptation cost of train flow on the adaptation station was converted into the weight of train arc by train service network. Thus, the solution of the model was transformed into the generalized shortest path problem of the train service network. The model was solved by C++ program language. Taken the train flow from Jiangcun to Fengtai West as an example, the validity of the model was verified.