Four flavone compounds have been separated from the mature seeds of Sophora vicii folia. By means of physico-chemical and spectroscopic analysis, their structures have been identified as 5,7,3'-trihydroxy-4'-methoxyflavone (I); 7,3'-dihydroxy-1'-methoxyflavone (II); 7,4'-dihydroxyflavone (III) and 7,3',4'-trihydroxyflavone (IV). All of them are found in S. viciifolia for the first time, and I and II are found Sophora genus for the first time.