Microcapsule feed additive resisting to litopenaeus vannamei pathogenic vice hemolysis vibrio

The invention provides a microcapsule feed additive resisting to litopenaeus vannamei pathogenic vice hemolysis vibrio. The additive is composed of litopenaeus vannamei pathogenic vice hemolysis vibrio egg yolk antibody freeze-dried powder, astragalus powder and beta-cyclodextrin. The litopenaeus vannamei pathogenic vice hemolysis vibrio egg yolk antibody freeze-dried powder is mainly used for lowering or eliminating the possibility that the litopenaeus vannamei is infected by the vice hemolysis vibrio. The astragalus powder is used for improving the immunity of the litopenaeus vannamei. The beta-cyclodextrin is mainly used for making the egg yolk antibody freeze-dried powder play the embedding slow-release effect. According to the additive, spray drying is conducted on the obtained litopenaeus vannamei pathogenic vice hemolysis vibrio egg yolk antibody freeze-dried powder with the valence of the antibody reaching 211, the astragalus powder and the beta-cyclodextrin, microcapsule dry powder is obtained, the microcapsule feed additive and litopenaeus vannamei feed sold on the market are used for feeding litopenaeus vannamei together according to a certain proportion, the diseases caused by the pathogenic vice hemolysis vibrio can be prevented and treated in the breeding period of the litopenaeus vannamei, the breeding survival rate of the litopenaeus vannamei is raised, and the economic benefits of litopenaeus vannamei breeding and production are remarkably increased; the problem that at present the red body disease is caused by the vice hemolysis vibrio easily in the litopenaeus vannamei breeding and production processes is solved.