Abstract: In essence，railway intelligent transportation system (RITS) is an unity which is founded on the basis of person distribution and physical distribution. The information-shared platform of RITS is the center, through which the sub-systems communicate with each other in the RITS. On the basis of studying the demand of information searching of all railway departments and customers， the information-shared system is studied in the paper. Firstly, the appropriate architecture of information-shared system of RITS is put forward based on the current distributed computing architecture. Then the merit and defect of component software technologies are investigated,
therefore，the key technologies of constructing information-shared system are selected. Subsequently，the data-integrated scheme of system and method of integrating data from deferent database are researched. At last，the general system architecture of the information-shared system is constructed.

Key words: railway intelligent transportation system, information-shared, demand analyze, data integration, general architecture design

摘要： 铁路智能运输系统(Railway Intelligent Transportation System,RITS)在本质上是建立在信息流基拙上的人流和物流的统一体，共用信息平台是RITS中各个子系统互相通信的信息中枢.在研究和分析全路内外对信息查询的需求的基拙上，对信息共享系统进行研究.首先分析当今流行的分布式计算结构，提出适合RITS信息共享系统的体系结构;然后分析当前主流的构件技术模式，提出建设信息共享系统所采用的关健技术;同时研究数据集成模式及数据集成方式，最后建立信息共享系统的总体结构.

关键词: 铁路智能运输系统, 信息共享, 需求分析, 数据集成, 总体结构设计