The invention discloses a
celery seed extract and a preparation method thereof. The preparation method comprises the following steps of (1) taking
celery seeds, performing crushing, performing screening, adding diatomite which is 3-5% by
mass of medicinal materials, adding 50-60%
ethanol which is 8-12 times, performing reflow extraction, performing sucking
filtration, merging filtrate, and performing decompressed concentration to obtain an extracting solution; (2) taking the extracting solution, adding the extraction solution in which the ratio of
ethyl acetate to n-
butanol is 2 to 8 or 1 to 9, performing stirring, performing standing, performing extraction, collecting an
organic layer, performing decompressed concentration, and performing
drying to obtain a total flavonoids extract; and (3) taking acid aluminum
oxide, wherein the weight ratio of the acid aluminum
oxide to the total flavonoids extract is 1 to (10-20), performing packing, performing activating with
petroleum ether, taking the total flavonoids extract, taking the
ethanol, performing complete dissolving, adding the acid aluminum
oxide, performing stirring, performing evaporating to
dryness so as to remove the
ethanol,performing sample feeding, performing eluting with the
petroleum ether, performing eluting with the ethanol, collecting ethanol
effluent, performing
drying, and performing detection to obtain a
celery seed extract. The content of total flavonoids of
celery seeds can be effectively increased, so that the content of the total flavonoids of the
celery seeds achieves 80% or above.