Depending on the geochemical elements analyses of sediments in northern Taihu lake. We try to rebuild environmental change over the past 8 000 years. The evolution of sedimentary environments in Taihu lake can be divided into four stages:1) 8.0 ~ 6.6 kyr BP,the warm and wet period; 2) 6.6 ~ 2.6 kyr BP,the deterioration and frequent fluctuations period; 3) 2.6 ~ 1.5 kyr BP,the warming period; 4) 1.5 ~ now, rapid deterioration of the climate. Two warm and wet period mentioned in present paper may instruct that there were two obvious enhanced of the East Asian monsoon during 8 000 years, which led to the two distinct high-water period of lakes in the Yangtze River during the Holocene.