Abstract: According to the fishing record of the light seine information vessel in Minnan-Taiwan bank ground during1989 to 1999, the effects of submarine topography and water depth on distribution of pelagic fish community in Minnan-Taiwan bank fishing ground was studied. The results showed that the pelagic fish distributed concentratively, while the submarine topography and water depth varied widely, but in different fishing regions, the distribution of pelagic fishes was uneven. The distribution of fishing yield increased from north to south, and closed up from sides of the bank to south or north in the regions. Pelagic fish distributed mainly in mixed water in the southern Taiwan Strait, and in warm water in the Taiwan Strait. The central fishing grounds were at high salt regions. Close gathering regions of pelagic fish or central fishing ground would be varied with the seasonal variation of mixed water in the southern Taiwan Strait and warm water in the Taiwan Strait.Central fishing ground was not only related to submarine topography and water depth, but also related to wind direction, wind power and various water systems. In the fishing ground, the gathering depth of pelagic fish was 30～60 m in spring and summer, and 40～80m in autumn and winter.