以北京轨道交通线网多线共用AFC系统线路中心（MLC）的工程设计为例，从国内轨道交通线网AFC系统架构设计现状出发，分析目前存在的问题；从MLC建设目的出发，结合北京市轨道交通线网规划情况及建设时序，对MLC建设方案进行比选，确定北京市轨道交通MLC建设方案。在我国城市轨道交通业界首次提出MLC的概念并力求投入应用，以期对今后国内外轨道交通线网AFC系统线路中心（LC）的资源共享设计研究有所指导和参考。

In this paper，engineering design of the Multiple Line Center Computer ( MLC) of Beijing rail transit network AFC system is taken as an example． Existing problems are analyzed based on present domestic situation of rail transit network AFC system architecture design． From the perspective of the objective of constructing MLC，with consideration of Beijing rail transit network planning and construction sequence，Beijing rail transit MLC construction scheme has been confirmed． It was the first time in China that MLC system was proposed and put into practice in urban rail transit industry． The system also has important guiding significance and practical reference value for the future design of LC system of urban rail transit network AFC system at home and abroad．

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