Through ethanol extraction and liquid-liquid extraction combined with column chromatography,the different components in Henan propolis and the poplar resin were isolated.The separation effect and the separation components was determined by high performance liquid chromatography(HPLC).The in vitro hypoglycemic activity of each isolated fraction was evaluated by theα-glucosidase inhibitor screening model,at the same time,oral glucose tolerance test(OSTT)was carried out in hyperglycemia mouse model induced by ...