The Liangzhu sites group is located in Yuhang division of Hangzhou City, Zhejiang Province. Synthetic analyses of grain size and pollen of sedimentary samples from North and West Liangzhu profiles near the Liangzhu city-walls revealed the relationship between the rise and fall of prehistoric cultural and four stages of Holocene sedimentary environment evolution in this area: 1) before 7 ka B.P., sedimentary environment went into a relatively high water level stage with cyan-gray still-water deposits and the finest grain size (6~6.5 Ф); 2) 7~5.1 ka B.P., the regional water level declined and the overlying shallow-water deposits were thin with partial strong hydrodynamic; 3) 5.1~4.3 ka B.P., the water level continually declined and reached the lowest level. Liangzhu culture sites distributed all over the low-lying plains with thicker cultural layers; and 4) 4.3~3 ka B.P., the level of water increased, and the Liangzhu cultural layers were submerged by river floodplain facies which were mainly made up of brown yellow silt (5~5.5 Ф).