The section of Yangtze River in Jiangsu Province was selected as the research area. Seven cross-sections of paleo-valley depositional sequences were established with 285 bore datum and 8 documents from the references. The results indicate that, in the Last Glacial Maximum (LGM), the incised-valley was cut down into bedrocks at the upper reach of Zhenjiang Province, and the paleo-channel of Yangtze River flows through old riverbed sedimentary facies at the down reach of Zhenjiang Province, and the paleo-valley formed partly deep cut in the Xiaguan-Qixia Mountains. It is also found that the sediments of the paleo-valley in Jiangsu reach consist of an obvious rhythm from graver and coarse sand to fine sand from bottom to top and the sedimentation was gradually fined along downstream.