///Qianliyan Uplift to the north of the Southern Yellow Sea is uplifted basement which exposed for a long time. The regional analysis and division of the gravity anomaly in the South Yellow Sea and the comparative study of the petrologic geochemistry between Qianliyan Uplift and Sulu Uplift are researched, these illustrated that the geological genesis of them is the same. The former is the extension of latter in marine. Both formed due to collide of the north China plate and Yangtze plate in Indo-Chinese Epoch. The Qianliyan fault becomes the syngenetic normal fault by the westward subduction of Pacific Plate in Early Cretaceous.