Abstract: 07SR03 core was collected from the Dabeicao channel and Dongsha shoal area of the radial tidal ridge system offshore of Jiangsu Province, the southern Yellow Sea. Analyses of sedimentary facies, 14C dating, δ13C, and C/N were carried out, together with the geological and geomorphological data available from the literature, in the present study. The 28 sediment samples recorded ages ranging from 41420±615 to 5630±5014C yr B.P.. The sedimentary materials consist of fine to coarse grained sands with parallel lamination or cross stratification and massive or laminated muds. Information on δ13C (?26.504‰ to ?21.812‰) and C/N (0.045 to 64.156) indicates mostly marine and freshwater phytoplankton sources for the organic matter. These results reveal the late Pleistocene paleoenvironment in the southern Yellow Sea. Two δ13C high values appear at 18~20m and 55.6~70m of 07SR03 core, corresponding to a glacial regressive situation, as is indicated by the terrestrial organic matter deposition of C4 plants. On the basis of the 07SR03 data set and relevant literature, sea level fluctuations in the study area since the late Pleistocene are identified, with alternating transgressive and regressive periods sine 40 kaB.P.. Around 20kaB.P. with the Last Glacial Maximum coming the relative sea level dropped to -100m. With the temperature increase, the sea level rose gradually, except for the little regression during the Younger Dryas period. From then on, sea level rise became rapid with the advent of the Holocene transgression, followed by slow falling and relatively stable periods. The distribution of δ13C, and C/N, together with facies associations, show that the depositional settings are related to fluvial, tidal flat, terrestrial (characterized by the stiff mud deposit), tidal flat, shoreface and tidal sand ridge facies, respectively, from the bottom towards the top parts within the core.