The content and form studies of selenium (Se) in the paddy soils as well as Se contents in the correspond organs (root, stem, leaf, rice) of matured rice plants from north Zhejiang was presented in this paper. The results showed that the studied paddy soils belonged to the medium Se rich soils with the average Se contents of 0.344 mg/kg. There was significant positive correlation between total Se content and organic matter content. Seven different Se forms were separated from the paddy soils, the strongly organic combined and humic acid combined Se were the dominant two forms, which together accounted for about 75.92%, the ion exchangeable and soluble Se together accounted for about 1.7% and the carbonate combined Se accounted for about 3.2%. Se content enriched in the root system, accounted for 73% of the total Se content in the rice plant. Se content in stems was higher than in ears but lower than in leaves. There was a significant positive correlation between the oxides of iron and manganese combined Se and Se content in the root when the total organic matters in the soils lower than 25 g/kg, while this type Se in the soils had a significant positive correlation with Se in the ears when the total organic matters in the soils higher than 35 g/kg; the carbonate combined Se negatively correlated with Se in ears when pH>7. However, there were no clear correlations between the soluble and ion exchangeable Se and Se in various organs of rice plants. The above results indicated that Se contents in the different organs of rice plants were influenced comprehensively by soil pH, organic matter content, and the contents of different form Se.