The south coast of Laizhou Bay is one of the most typical areas of saltwater intrusion, which has a close relation with the environmental evolution since the Late Pleistocene This paper deals mainly with the systematic palynological and sedimentologic studies on 25 samples since the Late Pleistocene from a 29 m column core A1 According to the sporepollen diagram, 7 assemblage zones have been distinguished, and the paleovegetation and paleoclimatic fluctuations are discussed There were three warm and wet periods since 120 ka BP， that is 85～76 ka BP, 50～24 ka BP  and 10～4 ka BP, coeval to Yangkou seawater transgression, Guangrao seawater transgression and Kenli seawater transgression respectively  The depositional types were paralic swamp or lake during these periods, and the main vegetational types were coastal steppes with deciduous broadleaved forest or needlebroad leaved mixed forest Two cold and dry periods were 76～50 ka BP  and 24～10 ka P, coeval to early Dali glacial epoch and late Dali glacial epoch, which were dominated by continental environments. The main vegetational types were needleleaved forest steppe and needleleaved forest arid steppe or hungriness steppe The environmental change stages based on sporepollen records on south coast of the Laizhou Bay since the Late Pleistocene are consistent with global climate events as well as the environmental change stages around the Bohai Sea