Protein was extracted from konjac powder by alkali extraction and acid precipitation method; konjac protein is material,konjac ACE inhibitory peptides crude were prepared by alkaline hydrolysis protease on konjac protein; its crude macromolecular impurities were removed by ultrafiltration,Sephadex G-15 column chromatography,and RP-HPLC purification. Highly purified konjac ACE inhibitory peptide was obtained. The ultrafiltration,Sephadex G-15 column chromatographic separation conditions were optimized; hippu...