Due to the geographical conditions and other factors, an emergency have occurred on railway frequently in China, which tend to undermine the railway traffic equipment, intertupt train operation and disrupt the operation order. As the growth of railway network, its impact will be greater. 由于地理条件等因素,我国铁路突发情况时常发生,而这些突发情况往往会破坏铁路行车设备,造成运行中断,打乱运行秩序,且随着路网规模的扩大,其影响也会越大。