Abstract Of the total length of 345 km of Taiwan High Speed Rail Project,330 km are contracted by Taiwan High Speed Rail Corporation. Of it,13% in length,approximately 44 km,is tunnels. It consists of 5 open-cut tunnels and 42 bored tunnels. Of them,4 are longer than 3 km and 6 are longer than 1 km. Design concept and the construction status of these tunnels are described