Abstract: The SouthtoNorth Water Transfer Project is located on 3 000 mhigh Tibetan Plateau, where it is cold and oxygen is insufficient. The total length of the water transfer tunnels is 244 km. The longest tunnel is 73 km long, for which the TBM drives 25 km distance in one single direction. One ventilation shaft is to be installed, therefore the singledirection ventilation distance reaches 14 km. In the paper, study is made on the equipment and system for the 14 kmlong singledirection ventilation and proposal is made on the 14kmlong singledirection ventilation program. 

Key words: SouthtoNorth Water Transfer Project, tunnel, ventilation during construction