Composite shell strengthening additive for litopenaeus vannamei and preparation method thereof

The invention discloses a composite shell strengthening additive for litopenaeus vannamei and a preparation method thereof. The composite shell strengthening additive for the litopenaeus vannamei is characterized by being prepared by, by weight, monocalcium phosphate 60%-70%, astaxanthin 2.3%-3%, cholesterol 5%-10%, phosphate 12%-16% containing 35% of vitamin C, vitamin D 31%-2%, vitamin E 3%-4% and beta-glucan 9%-10%. A chemical name of the astaxanthin is 3,3'-dyhydroxyl-4,4'-diketo-beta,beta'-carotene, and a molecular formula is C40H52O4. The preparation method comprises the steps of weighing ingredients by weight percentage, respectively smashing the ingredients and placing the ingredients into a mixing machine to be evenly mixed, wherein the monocalcium phosphate is added first and then other ingredients are further added in succession. By means of the composite shell strengthening additive for the litopenaeus vannamei and the preparation method, the problems including soft shells, shell shedding failure,