Abstract: Through an intensive study on pollen and spores from core CJ08-185,three palynological assemblages have been distinguished.Based on the AMS ¹⁴C dating data, three stages of the evolution of paleovegetation and paleoclimate have been reconstructed since the Atlantic period in the coastal areas of South Yellow Sea as follows:(1)The mixed forest of evergreen broad-leaf trees, deciduous broad-leaf trees and conifers, indicating a hot and moist climate(Atlantic period);(2)The mixed forest of conifers and broad leaves-grassland,taking Quercus,Pinus as the main elements in palynological assemblages, reflecting a warm and little dry climate (Sub-Boreal period);(3)The mixed forest of conifers and broad leaves with a few kinds of evergreen broad-leaf trees.It was a warm and slightly dry period (Sub-Atlantic period).