Based on the data of palynology from the borehole ZKA4at Daqiao town, Jiangdu, Jiangsu Province, 11 assemblages are recognized as follows:1.Betula-Ulmus-Artemisia, 2.Ulmus-Chenopodiaceae-Quercus, 3.Artemisia-Gramineae-Quercus, 4.Liquidambar-Polypodiaceae-Ulmus, 5.Pinus-Quercus-Betula-Juglans, 6.Quercus-Juglans-Artemisia, 7.Quercus-Polygonum-Juglans-Carya, 8.Betula-Gramineae-Artemisia, 9.Quercus-Polypodiaceae, 10. Podocarpus-Triorites-Polypodiaceae, and 11.Pinus-Podocarpus-Juglans-Pterocarya.Based on palynological assemblage(PA), seven stages of climate change have been identified:Stage 1(corresponding to PA 1)was characterized by evergreen and deciduous broad-leaved mixed forests, representing a cold and dry, with subsequent warmer climate; Stage 2(corresponding to PA 2)was dominated by alpine shrubs, deciduous broad-leaved mixed forests, representing a cold and dry climate;Stage 3(corresponding to PA 3)was dominated by herb deciduous broad-leaved mixed forests, show the beginning of a warm and dry climate;Stage 4(corresponding to PA 4-5)was associated with deciduous broad-leaved forests, displaying the overall warmer climate;Stage 5(corresponding to PA 6-7)was dominated by deciduous broad-leaved mixed forests, indicating it was warm and slightly dry;Stage 6(corresponding to PA 8-9) was dominated by the coniferous forests(consisting mainly of coniferous and broad-leaved mixed forests), representing a cool and wet climate;Stage 7(corresponding to PA 10-11)was associated with evergreen and deciduous broadleaved mixed forests, mainly representing a warm and wet climate.