The invention discloses a red
ginseng extract. The extract is characterized by containing
ginsenoside Rg1,
ginsenoside Re,
ginsenoside Rf, notoginsenoside R2 and ginsenoside Ro. A preparation method of the extract comprises the following steps:
cutting red
ginseng serving as a medicinal material into pieces, adding water in an amount which is 3-10 times that of the red
ginseng, soaking for 0.5-2 hours, heating and performing
reflux extraction for 1-2 hours, extracting for 1-3 times, combining extraction solutions, filtering and concentrating; separating and purifying a concentrated solution with a reverse phase
silica gel column; eluting with 30-40 percent
methanol-water by 4-10L, and discarding; and eluting with 50-70 percent
methanol-water by 4-6L, collecting an eluent and concentrating to obtain active ingredients.