This paper tests the four mediating effectconsumption demand effect，innovation effect，labor endowment effect，labor productivity effect using the 31 provincial data from 1995 to 2012The empirical results show that information technology can effectively improves the development of the hightech industry in manufacturing industryIt is true that information technology can guide or force the industrial structure to change from laborintensive and resource intensive to knowledge intensive through four effects，but there is also an inefficient evolution of industrial structureIn addition，there are regional differences in the promotion effect of information technology on the transformation and upgrading of industrial structureThe promotion effect in the central and western regions is greater than that in the eastern regionAt the end of the paper，the relevant policy suggestions are put forward

本文利用1995—2012年省级面板数据对信息技术促进产业结构优化升级的消费需求、创新驱动、劳动力禀赋、劳动生产率等效应进行了检验。实证研究表明：信息技术能有效推动制造业向高新技术产业转型，引导或倒逼产业结构由劳动密集型、资源密集型向知识密集型转变，但存在“产业结构演进无效率”现象，且信息技术对产业结构转型升级的促进作用存在区域差异，中西部地区的产业结构升级效应要大于东部地区。本文最后提出了相关的政策建议。