利用木垛火模拟地铁火灾的演化过程，在地铁车站出入口的缩尺度模型中进行模拟实验。采用温度相对值，分析地铁火灾沿车站出入口烟气温度下降的规律及其影响因素。通过实验图像，对烟气分层所需条件以及区域模拟方法在地铁火灾烟气特性研究中的适用性进行了讨论。气体成分测量结果表明，出口处烟气中CO的质量分数存在阶梯状变化的规律。

A series of simulation experiments, carried out on the scale model of subway station passageway are described, in which wood crib fires are used as the evolvement process of subway fire. Temperature relative value is provided to analyze the law of smoke temperature along the station passageway in subway fire and its affecting factors. Based on images collected, the conditions needful for coming into being smoke layer and the applicability of zone model are discussed in the investigation of smoke properties in subway fire. Otherwise, it is also indicated from the results of smoke component measurements that CO concentration at the exit rises with stepwise change.