Abstract: By utilizing soil moisture data of international soil moisture network from Dongbei,Hetao and Jianghuai regions of China. Discussed three areas with different soil moisture characteristics,response with temperature and precipitation,and other climate change factors during 1981 ~ 1999 by using trend analysis,correlation analysis and mutation test methods. The results can be concluded as follows. Regions of Dongbei,Hetao have higher value of soil moisture. Changes in soil moisture during the year and interannual variability of soil humidity values displayed by the increasing trend of shallow to deep. During this time. Regions of Dongbei have most significant relationship. Dongbei,Hetao have a trend of reduced precipitation when soil moisture with a downward trend,but Jianghuai have a trend of raise. Soil moisture response to precipitation changes is more significant than the temperature changes.