Abstract: Abstract: Through studying the macroscopic recognition mark of paleoclimatic cycles from standard stratigraphic holes and using the theory of high-resolution sequence stratigraphy, the authors solved the problems of stratigraphic division of the Quaternary and isochronous correlation of over 200 holes in the Hangzhou-Jiaxing- Huzhou plain. On that basis, the authors constructed high-precision correlative sections and a quasi-instant lithofacies-paleogeographic map, which offer more precise information for the study of the stratigraphic division of the Quaternary and palaeogeomorphologic change of the plain. Using the "base-level cycles" as the basis for the sequence stratigraphic division and treating the paleosol layer and its correlative exposure surface and river erosion surface as the boundary, the authors divide the Quaternary of the plain into nine subsequences and find that the subsequences can be coupled with the climatic cycles.