The invention discloses a method for preparing
perilla oil powder through composite condensation microencapsulation, and in particular provides a preparation method of a
perilla oil microcapsule which is low in cost and stable in property. The preparation method comprises the following steps of: adding an emulsifying agent into a soy isolated
protein solution, and stirring to dissolve the emulsifying agent; adjusting the pH value of the solution to ensure that soy isolated
protein has same electric charges with
sodium alginate; adding
perilla oil into the obtained solution, homogenizing to obtain an
emulsion, adding a
sodium alginate solution into the
emulsion, and uniformly stirring; adjusting the temperature of a
system to 40-50 DEG C, and adjusting the pH value to ensure that the soy isolated
protein has charges opposite to those of the
sodium alginate and then a composite condensation product is formed in the
system; diluting and reducing the temperature of the composite condensation product by adding water, putting the composite condensation product into an ice bath, and continuously stirring until the temperature is lower than 10 DEG C to ensure that the composite condensation product is gelatinized; adding glucose or
pectin into the
system, and curing; and filtering, washing, depositing, and performing freeze-
drying to obtain a perilla oil microcapsule product. The perilla oil microcapsule product obtained by the method can be widely applied to the fields of foods, medicines and the like.