台湾岛位于东海陆架边睡，是我国大陆东缘的海岸山脉，岛四周的大陆架明显不对称，东部海底以1／10的坡度急降到太平洋中，离岸不到10km，即降到1000m水深，离岸约50km，水深可达4000m。但在岛的西部，陆架则连续延伸140～200hm与大陆海岸衔接，西部陆架大部价区域水深小于60m Taiwan Island is located on the shelf of the East China Sea and sleeps on the shelf. It is a coastal mountain range on the eastern edge of the mainland China. The continental shelf around the island is obviously asymmetrical. The eastern seabed plunges into the Pacific Ocean at a gradient of 1/10 and reaches a depth of 1000m , About 50km offshore, water depth up to 4000m. However, in the western part of the island, the continental shelf extends continuously for 140 ~ 200hm and connects with the mainland coast. The water depth in the western part of the continental shelf is less than 60m