The application discloses a kind of
choline-
amino acid ionic liquid for efficiently enriching TG, EPA or DHA in oil, and a preparation method and application thereof, and belongs to the technical field of
ionic liquid preparation.The method comprises dissolving
amino acid in water, adding
choline hydroxide, then heating to 50-70 DEG C to react, after reaction is completed, purification is carried out, and
choline-
amino acid ionic liquid is obtained, wherein the
molar ratio of amino acid to
choline hydroxide is 1: (0.5-2.5).The choline-amino acid ionic liquid is green and
pollution-free, and can be used for
crude oil refining in food,
medicine and other fields, especially suitable for
crude oil containing DHA, EPA, such as algal oil and
fish oil, and can complete degumming, deacidification and decolorization process in one step, significantly simplifying the
crude oil refining process, reducing
energy consumption and waste
discharge.