Abstract: The authors used the leaves of Wood oil tree (Vernida montana Lour), Tung tree (V. fordii (Hemsl) Airy Shaw), and Belgaum walnut (Aleurites moluccana (L.) Willd) as testing materials to study their differences of chlorophyll, free amino acid, protein, RNA and DNA contents. The results have shown that there is no difference between these two genera's DNA contents, but Belgaum walnut's chlorophyll and protein contents are higher than Wood oil tree's and Tung tree's, and on the contrary, its free amino acid and RNA contents are obviously lower than the Vernida's. Thus, from the biochemical view, it is reasonable that Airy Shaw has recently separated Vernida from Aleurites.