Research conclusions:For disaste rprevention and relief in tunnel, the principle of"putting prevention first, combining prevention with elimination, making self -relief easy and safe evacuation" should be followed. Train should be prevented to enter into the fire tunnel. The train should notstop in tunnelwhen itfires, and if the train has to enter into tunne,l itmust stop at the "emergency relief station" in the tunnel for evacuating people. When a train fires in tunnel and if it is cable tomove continuously, the basic principle of"first drawing the train outof the tunne,l then breaking up the train and treating the fire disaster" should be followed. Installation of the operational ventilation facilities should consider the requirements of the prevention and elimination of smoke and combine with the ventilation facilities for prevention ofdisaster. According to the principle of"simplicity, reliability andmoney-saving", the necessary devices for disasterprevention and relief should be installed in tunnel.