Preparation method of high-temperature-resistant microalgae DHA (docosahexenoic acid) oil microcapsule powder

A preparation method of high-temperature-resistant microalgae DHA (docosahexenoic acid) oil microcapsule powder comprises steps as follows: (1) raw materials are prepared; (2) whey protein and/or starch sodium octenyl succinate, lyophilic colloid, a food emulsifier, an acidity regulator and a sweetening agent are put into water, heat preservation and stirring are performed, and an aqueous phase liquid is obtained; (3) the aqueous phase liquid is heated to 90-95 DEG C, subjected to heat preservation for 20-30 min, stirred to be fully dissolved and then cooled; (4) a small amount of microalgae DHA oil and an oil-soluble antioxidant are evenly mixed, and a premix is obtained; (5) then the rest microalgae DHA oil is stirred evenly, then added to the premix and stirred to be evenly mixed, and a core material is obtained; (6) the core material is put into the aqueous phase liquid, a water-soluble antioxidant is added, the mixture is stirred and sheared, and an emulsion is obtained; (7) the emulsion is homogenized t