Preparation method of oyster nutrition powder

The invention discloses a preparation method of oyster nutrition powder. The preparation method comprises the following steps: grinding clean oyster meat to obtain oyster meat paste; uniformly stirring the oyster meat paste with deionized water to obtain first raw paste, regulating the pH value to 3, adding 537 acid protease; inactivating the 537 acid protease and extracting to obtain second raw paste; performing reduced pressure distillation on the second raw paste to obtain third raw paste; and regulating the pH value of the third raw paste to 7, adding active carbon, removing the abnormal smell of the third raw paste, filtering out the active carbon, adding dried siraitia grosvenorii powder which accounts for 5% of the third raw paste in weight, stirring uniformly, performing the reduced pressure distillation, removing the dieionized water, drying in an oven to obtain the oyster nutrition powder. The oyster nutrition powder is sterilized at a high temperature and encapsulated in a vacuum condition. The oys