结合南昌地铁2号线的设计实例，重点研究分析规划变化对地铁线路平面、站位布设、远期线路及纵断面等多方面的影响，认为只有在前期线路设计时（线位选择、车站增减、线路延伸、纵断面设计等），随时对各种规划的变化做出快速反应，并具有足够的前瞻性、灵活性和适应性，才能确保在保证百年工程使用功能的前提下，线路与现阶段的城市发展相匹配。

In the paper, the influence of the changes of plans on the plan layout of Metro lines, the layout of Metro stations, the layout of future Metro lines and the layout of longitudinal profiles of Metro lines is analyzed, with the design of Line 2 of Nanchang Metro as an example. Conclusion is drawn that in the early stage of the design of the Metro lines (such as in the Metro line location design stage, Metro station location design stage and longitudinal profile design stage), timely response should be made to the changes of the plan and that the design should be prospective, flexible and adaptable enough so that the Metro lines designed can match the city development well. 