According to the classification definition standard of soil selenium amount put forward by Li Jiaxi, it is confirmed that there exists selenium-rich soil in Zhejiang. Red earth in some areas and rice soil are important forms of selenium-rich soil in Zhejiang. The organic combination state in selenium-rich red earth and that in rice soil are the main combination patterns. The amount of weakly organic selenium is higher than that of strongly organic selenium in selenium-rich red earth, and the amount of ion exchange state selenium is lower than that of carbonate, but things are opposite in the latter case. The total amount of ion exchange state, carbonate state and ferric-manganese oxidation state has very little effects on full selenium.