Abstract: Vacuum tube transport has advantages such as small crosssection size, lightweight, and integrated structure. When it is constructed on a seabed as a seacrossing channel, its cost is lower than a seacrossing bridge, submarine, immerged, or submerged floating tunnel. Therefore, it is one of the alternatives for Taiwan Strait passage. Herein, the route direction, longitudinal crosssection, structure form of intosea point, and landing point of the seabed vacuum tube in the Taiwan Strait are analyzed. Subsequently, according to the principle of the shortest distance, the development of cities on the both sides of the Taiwan Strait, existing traffic status and future development plan, distribution of islands, topography, and landform of the seafloor, and based on the structural characteristics of vacuum tube and elevation data of Google Earth, the isobath map is drawn, and the line plane and vertical section maps under different conditions are given and compared. The rational route is located in the range of the PingtanHsinchu channel, including the PingtanTaoyuan Xinwu and PingtanHsinchu North districts. The route of the seacrossing section is approximately 128 km in length, and the largest depth and longitudinal slope reaches 87 m and 10‰, respectively. The intosea section should adopt the maximum slope limit to reduce the length lashed by seawaves, or the tunnel scheme should be adopted between the land and vacuum tube.

Key words: Taiwan Strait, seabed vacuum tube, route scheme, submarine topography, isobath, intosea point