The invention discloses a method for preparing an acai
berry extract. The method comprises the following extraction steps: step 1, picking acai
berry fruits, washing by using clear water, taking out the surface impurities, cleaning by using a steam cleaning
machine for 5-10 minutes, taking out the acai
berry fruits, and
drying; step 2, crushing and beating the dried acai berry by virtue of a beating
machine, adding water or / and water
alcohol 10-30 times of the beat dried acai berry for decocting or performing
reflux extraction for 2-4 times, wherein the time is 1-3 hours each time, combining the extracting solutions, filtering, performing vacuum concentration on the filtrate, concentrating, and
drying, thereby obtaining the
solid; and step 3, dissolving the
solid obtained in the step 2 in water, adding the
solid in the filled
macroporous resin column, filtering by virtue of the resin column, and washing the resin column by using
distilled water until the eluent is colorless; and adding an eluent into the resin column, collecting the eluent, performing vacuum concentration, and
drying to obtain the final extract. The invention also discloses an acai berry extract composition which comprises the following components in parts by weight: 20-40 parts of acai berry extract, 5-8 parts of hawthorns and 10-16 parts of
blueberry extract. The acai berry extract and the composition thereof have obvious effect of losing weight.