With the growing demand of dry bulk in China, rail-sea intermodal transport gets more attention. In order to define the key factors of rail-sea intermodal transport of dry bulk, this study uses system dynamic and modeling software VENSIM to establish system dynamic model of rail-sea intermodal transport of dry bulk, and the case of rail-sea intermodal transport of dry bulk of Meizhou Bay Port in Fujian is simulated and verified by the model. The result shows that the model is feasible and effective. Finally, the key factors in the model are sensitively analyzed, and suggestions for promoting the development of rail-sea intermodal transport in Meizhou Bay have been proposed.%随着我国对干散货需求的不断增加，海铁联运模式日益受到重视。为明确干散货海铁联运系统中关键因素，运用系统动力学及建模软件VENSIM，构建了干散货海铁联运的系统动力学模型，并采用福建省湄洲湾港干散货海铁联运案列对模型进行仿真验证，证明了该模型有效可行。最后对模型的关键因素进行敏感性分析，并提出促进湄洲湾海铁联运发展的相关建议。
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