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.