The invention discloses a preparation method of forest frog oil polypeptide microencapsulation. The preparation method comprises the main steps of carrying out controllable
enzymatic hydrolysis on forest frog oil to obtain a polypeptide core material solution, slowly adding a
wall material under the mixing condition (wherein the
wall material is prepared from the following components in percentage by weight: 1-10 percent of concentrated whey
powder, 1-10 percent of
maltodextrin and 0.5-5 percent of beta-cyclodextrine), adding 0.1-1 percent of
monoglyceride, carrying out high-speed shearing and homogenizing treatment to obtain an emulsified feed liquid, and carrying out low-temperature
spray drying treatment to obtain forest frog oil polypeptide microcapsule
powder. With the adoption of the forest frog oil polypeptide microencapsulation, the content of a forest frog oil polypeptide core material is above 10 percent, the
embedding rate is above 60 percent, the
powder collection rate is above 53 percent, and the sensory property of the forest frog oil polypeptide microencapsulation powder is good without fishy smell; compared with core material
spray drying powder without microencapsulation, the forest frog oil polypeptide microencapsulation powder has the advantages that the
moisture content is lowered by above 30 percent, the
solubility is increased by 3.5 percent, the hygroscopicity is lowered by 22 percent, and the dispersion time is shortened by above 30 percent. The preparation method has the characteristics that by virtue of the microencapsulation method, the fishy smell of a forest frog oil polypeptide product is removed effectively, the
raw material waste is avoided, the operation is simplified and industrial production can be promoted.