In this paper, both the effective parts and active components from the different solvent fractions which were petroleum ether part, ethyl acetate part, chloroform part, butanol part and water part in walnut pericarp were selected by MTT assay against human cervical cancer HeLa cells. The active ingredients were separated and purified by column chromatography, and identified by thin layer chromatography. The structure of the active ingredient was identified through LC-MS and NMR. The morphology of HeLa cells...