The paper describes general characteristics of massive concrete of extra-thick bottom board,introduces massive concrete construction preparations of high-rise buildings from aspects of internal cooling cycling pipe setting and distributive measurement temperature points and so on, and summarizes the application and maintenance methods of massive concrete construction technology of extra-thick bottom board,which can im-prove massive concrete construction technology level.%阐述了超厚底板大体积混凝土的一般特征，从内设冷却循环管、分布测量温度点位等方面，介绍了高层建筑大体积混凝土施工前的准备工作，并总结了超厚底板大体积混凝土施工技术的应用和养护方法，可提高大体积混凝土的施工技术水平。
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