According to the analyses of spore—pollen assem blages. 1 4 C data. and numerical method,the palaeomonsoon climatic changes in Mianyang region,Jianghan plain·have been reconstructed in the past lO000 years. The result indicates that climate has undergone changes of six stages in this region. During 6.5-4.4kaBP,the climate came up to its optim um combination between heating and moisture,and the sum mer rainfall area caused m ore precipitation to is region.About 3.9-1.7kaBP, there was a ravid drop in the temperature.but the higher effective hum idity corresponding to the expansion of great lake of Yunmentze was reflected by both rainfalI area and the movement of the Yangtze River from north to south. After 6kaBP,hum an activity occurred in this region,undergoing the nature developing process from depending on the nature environm ent in the early period,to adapting to the environment after 3.5kaBP.and to changing environment after 9.7kaBP.