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.