A
perilla oil α-
linolenic acid microcapsule and its preparation method belong to the
food processing field, including the following steps: (1) extraction of
perilla oil; using a bio-
enzyme-assisted low-temperature pressing method, a compound
enzyme is added to perilla seeds for
enzymatic hydrolysis, followed by low-temperature pressing to collect
perilla seed oil; (2) enrichment and purification of α-
linolenic acid; the
perilla seed oil obtained in step (1) is purified by molecular
distillation technology, and the
perilla oil fraction enriched with α-
linolenic acid is collected; (3) microencapsulation; using the perilla oil enriched with α-linolenic acid obtained in step (2) as the core material, after selecting a suitable composite
wall material, perilla oil α-linolenic acid microcapsules are obtained by
spray drying. This invention improves the extraction efficiency of perilla oil, retains the natural activity of α-linolenic acid; efficiently enriches α-linolenic acid through molecular
distillation technology, increasing the content of functional active ingredients in the product; and improves the oxidative stability and storage performance of α-linolenic acid.