Objective: To investigate contents of the total selenium,Inorganic selenium and organic selenium between the Selenium-rich Cordyceps and ordinary Cordyceps.Methods: UV spectrophotometry was used to measure the contents of the total selenium,Inorganic selenium,then we calculated to get the contents of organic selenium between these two kinds of Cordyceps.Results: The contents of the total selenium in Selenium-rich Cordyceps is 70 times as the ordinary,the contents of organic selenium is about 100 times as the ordi-nary,and about 97% of the the total selenium in Selenium-rich Cordyceps.Conclusion: Contents of organic selenium in selenium-rich Cordyceps developed by An San Hua-Yu Biotechnology Co.,Ltd is higher significantly than it in the ordinary Cordyceps.It suggested that the Selenium-rich Cordyceps has good value in future.