Extracting purified ginsenoside from leaves of Panax quinquefolium and ginseng at the same time and the preparing method thereof

The present invention relates to Chinese medicine and its extracting and processing technology, and is especially the effective part extracted from American ginseng leaf and ginseng leaf and its preparation process. The extracted effective part contains six kinds of ginsenoside substances, including ginsenoside Re, ginsenoside Rb1, ginsenoside Rb2, ginsenoside Rb3, ginsenoside Rc and ginsenoside Rd. Its preparation process includes water extracting American ginseng leaf and ginseng leaf in the weight ratio of 1 to 0.3, macroporous resin adsorption of the water extract liquid, water eluting to eliminate impurity, further eluting with two kinds of elutents, collecting the eluted liquid, and refining the total solid matter to reach purity up to 63.45 %. The extracted effective part has less side effects, and may be used widely in compound medicine preparation and functional food and for separating ginsenoside substance.