The invention discloses a preparation method of a composite 
inactivated vaccine for an IBD (infection bursal 
disease) and belongs to the technical field of animal biological products. The preparation method comprises technological steps as follows: 1), 
virus reproduction; 2), preparation of the composite 
inactivated vaccine for the IBD: 1-2 parts of an 
immunopotentiator is added to each 1,000 ml of an IBDV (infection bursal 
disease virus) 
antigen solution checked to be qualified in inactivation, the mixture is uniformly mixed, emulsification packaging is performed on the mixture and a 
summit livestock water-in-oil-in-water 
adjuvant in the volume ratio being 3:2, and the composite 
inactivated vaccine for the IBD is prepared. The novel 
vaccine adjuvant is adopted, and the prepared vaccine has double characteristics of 
water in oil and 
oil in water, combines the sustained release function of an ordinary vaccine and has advantages of joint actions of the water-soluble 
immunopotentiator, flavone of traditional Chinese medicines, a pain killer and the like. With the adoption of the effective 
immunopotentiator, the 
immunity of a body is greatly improved, the 
cellular immunity capability of the inactivated vaccine is improved, the body is stimulated to generate efficient neutralizing antibodies, and the 
disease prevention capability of the body is improved.