对烟气在大空间建筑内的充填规律作了分析，并在中国科技大学与香港理工大学合建的大空 间火灾实验厅内进行了若干轮试验。结果表明，在着火的初期阶段，大厅上部的烟气流动比较紊 乱，但在以后的大部分时间，烟气的充填过程仍可用火灾区域模拟方法计算。 The law of filling flue gas in a large space building was analyzed and several rounds of tests were conducted in the large space fire laboratory jointly established by China University of Technology and Hong Kong Polytechnic University. The results show that in the early stage of fire, the flue gas flow in the upper part of the hall is disordered, but the flue gas filling process can still be calculated by the method of fire area simulation for most of the time.