The invention relates to a preparation method of a
nitraria tangutorum seed extract as well as a product and application of the
nitraria tangutorum seed extract, the preparation method comprises the following steps: performing ultrasonic-assisted enzymolysis on crushed and sieved
nitraria tangutorum seeds to obtain an enzymolysis product; carrying out subcritical extraction on the enzymolysis product by using subcritical water to obtain extract liquor; filtering and concentrating the extracting solution to obtain a nitraria meadowrue seed crude extract; and carrying out
flocculation treatment and decoloration treatment on the nitraria meadowrue seed crude extract to obtain the nitraria meadowrue seed extract. According to the preparation method, ultrasonic-assisted enzymolysis and subcritical
water extraction technologies are adopted, purification is further carried out through
flocculation treatment and decoloration treatment, the nitraria sibirica seed extract rich in
polysaccharide and
oxymatrine can be obtained, no
organic solvent or toxic and harmful chemical substances are used in the preparation process, and the preparation method is green,
environmentally friendly and suitable for industrial production. The obtained nitraria seed extract is safe and non-irritant, has definite
biological activity, can be applied to the field of
skin care products, and realizes industrial production.