Abstract:In this paper, the quantitative analysis of the total flavone in 7 species revealed the contents: Semen Cuscutae Chinensis(3.0%), Semen Cuscutae Australis(3.2%) as compared with Semen Cuscutae Europaea(4.5%). Semen Cuscutae Chinensis has the highest content of polysaccharide of about 5~6%. The experimental results provide a scientific basis the rational use of Semen Cuscutae.