The aim of this article is to study the moisture characteristics and the effect factors of three main kinds of paddy soils (White soil

Yellow mud soil and Wushan soil) in Tai Lake region. The physics properties of the paddy soils have been studied

which includes bulk density

soil texture

soil structure coefficient

soil aggregation

and soil moisture characteristic curves. It is compared that soil moisture characteristic curves of the paddy soils and figured out their field capacities

available water content and wilt coefficient. The results showed that field moisture capacity was significant negative correlated with bulk density and significant positive correlated with soil structure coefficient

soil aggregation and organic matter content. In addition

available moisture content was negative correlated with soil texture

wilt coefficient was positive correlated with soil texture.