本文详细地研究了有关长大列车运行安全性的问题。为不同上部建筑的线路提出了侧向力、构架力和垂直力的极限允许值。文内还为一些具体铁路局提出了长大货物列车的合理牵引工况、制动工况以及通过限速点的注意事项。此外,还根据减小对线路作用的要求。提出了长大货物列车通过限制坡道的合理编组方案,其中包括机车在列车中应配置的位置。 This article has studied in detail the issue of safety of the operation of long-distance trains. For the different superstructure of the line put forward the lateral force, frame force and vertical force limit allowable value. The text also made for some specific Railway Bureau reasonable long-haul goods trains traction conditions, braking conditions and the speed limit through the points of caution. In addition, according to reduce the role of the circuit requirements. Proposed a reasonable grouping scheme for the long-freight trains to pass through the limit ramps, including the locomotives should be configured in the train.