Research conclusions：Through the research on the upgrading plan of the marshalling station, it is decided to upgrade the up system of marshalling station into two-stage -four-yard and the down system into three-stage-three-yard by using level untwining reasonably with consideration of the numbers of freight train, train flow properties, flexibility of operation route and demands of transport development under condition of no way to adjust the existing layout largely. Therefore, the upgraded station can meet the near and long-term development demands and save the construction investment.