大空间建筑火灾具有很多特殊性，但目前对这方面的了解还很不够，有关的防火安全设计数据也很缺乏。为此建造了大空间火灾实验厅，研究这类建筑的火灾规律与防治技术。本文简要讨论了该实验厅的设计特点和烟气充填的初步试验，并对将要开展的研究作了简要介绍。 Large-scale building fires have many particularities. However, there is not enough understanding of this issue at present, and the relevant fire safety design data are also scarce. For this purpose, a large space fire laboratory was built to study the fire rules and prevention technologies of such buildings. This paper briefly discusses the design features of the laboratory and the preliminary experiments of flue gas filling, and gives a brief introduction of the research to be carried out.