通过对289口钻孔资料作层序地层学分析，以下切古河谷底部的侵蚀面及古河间地古土壤层项面为层序界面，据此将长江三角洲晚第四纪地层划分为三个层序．古河谷和古河间地高程相差较大，但划分出的三个层序在横向上可以进行对比．长江三角洲晚第四纪地层存在古河谷相序和古河间地 Through the sequence stratigraphy analysis of 289 borehole data, the erosion surface at the bottom of the ancient valley along the ancient river and the paleosol layer in the ancient riverbed are sequence interfaces, and the Late Quaternary strata in the Yangtze River Delta are divided into three Sequence. The differences between the ancient river valley and the ancient river are quite different, but the three separated sequences can be compared horizontally. The Late Quaternary strata in the Yangtze River Delta have the paleo-valleys facies sequence and ancient river space