列车运行图是铁路运输工作中受多种因素制约、技术性强的综合性计划，是铁路行车组织的基础。编制列车运行图是一项繁重、复杂而又细致的工作，其编制质量的好坏直接影响铁路运输的效率和安全。目前，国内外利用计算机编制列车运行图的研究已取得一些重要成果，原苏联、日本等 The train operation plan is a comprehensive plan that is subject to many factors and has strong technical force in railway transportation. It is the basis of railway traffic organization. The preparation of the train diagram is a heavy, complicated and meticulous work, the quality of its preparation directly affects the efficiency and safety of railway transport. At present, some important achievements have been made in the research on the compilation of train operation plans by computer at home and abroad. The former Soviet Union, Japan, etc.