Objective:To extract flavone in Oldenlandia diffusa(willd.)Roxb.and to evaluate its effect on HepG-2 cell growth inhibition by MTT assay.Methods:To extract flavone in Oldenlandia diffusa(willd.)Roxb.by refluxing and to determine its content by Standard Curves Methods,and then to detect its effect on human HCC cell line (HepG-2)cell growth inhibition by MTT assay.Results:The flavone in Oldenlandia diffusa(willd.)Roxb.was extracted and obtained successfully.Its content was about 15% and it inhibited HepG-2 ce...