The invention relates to the technical field of food and discloses a
pumpkin seed oil extraction method. The method includes steps of
raw material crushing, enzymolysis,
freeze drying, oil extraction, purification for refinement, packaging and storage. Obtained
pumpkin seed oil is rich in
nutrition and rose red in color, the extraction rate is up to 62.7%, and income is increased by 16.2%. By crushing and homogenizing of pumpkin seeds with shells, rich
nutrition, oil particle dispersion and extraction rate increase are realized. By complex enzymes for damaging
cell tissue structures and decomposing
macromolecular substances, oil extraction is facilitated, and micromolecular nutritional components in oil are increased. By absolute ethyl
alcohol extraction of the pumpkin seeds subjected to
freeze drying, nutritional components are kept, absolute ethyl
alcohol consumption is reduced, and subsequent decontamination procedures are simplified. By purification of coarse
pumpkin seed oil through medical stone
powder, nutritional components are enriched while toxic substances are removed, and purity of
pumpkin seed oil reaches 97.8%. Since toxic agents are avoided in a whole extraction process, health and environment friendliness are realized, and
human health is guaranteed.