围绕苏通大桥前期工程方案论证决策过程，重点介绍苏通大桥桥位论证、跨江大桥主桥工程方案研究与比选论证和有关前期科研工作概况。在跨江大桥主桥工程方案研究和比选论证过程中突出介绍了主桥桥型方案构思、1 088 m斜拉桥方案研究与比选、主桥结构体系研究与比选、主桥主要构件结构方案研究与比选，并从基础资料专题研究和桥梁关键技术研究两个方面介绍了苏通大桥前期科研工作概况。

This article presents the justification and decision-making of the project plan during the initial stage for Sutong Bridge, with emphasis on initial stage for Sutong Bridge with respect to the justification of location of Sutong Bridge, comparison and selection of project plan for the river-crossing main bridge and studies on special research subjects.