Based on the analyses of lithology, grain size and sporopollen of sediments from the DGY borehole in the Taihu dishlike depression, this paper discusses the evolutions of vegetation, climate and geomorphology in the Taihu dishlike depression since 8ka BP.The records of sporopollen show that the arbor vegetation changed from deciduous broadleaf trees and conifer trees to deciduous and evergreen broadleaf trees  during 8～5 kaBP. This indicates that the palaeoclimate changed from warm dry to hotwet during this period of time. The shrinkage of forests reflects a cool and dry climate during 5～4 ka BP. A cooling event occurred at ～4ka BP. During 4～3ka BP, the forest was mainly composed of evergreen broadleaf trees, reflecting a warm and wet climate. Since 3 ka BP, the forest was mainly composed of conifer trees and evergreen and deciduous broadleaf trees, reflecting a warmmoist climate. Interpretations of sporopollen records also suggest a cooling trend with some fluctuations during this period. The records of sporopollen, lithology and grain size show jointly that muddy silt of lagoon facies prevailed in the area during 8～5 ka BP, reflecting an open depositional environment effected by seawater. Freshwater marsh prevailed  and the seawater effect vanished during 5～4 ka BP, reflecting the shrinkage and  isolation of the lake area. The lake area growths and saltwater intrusion occurred during 4～3 ka BP, suggesting the formation of the dishlike depression of the Taihu drainage area.Freshwater marsh which was influenced occasionally by tidewater has prevailed since 3 ka BP, reflecting the further development of the dishlike depression in the study area.