Compound enzyme feed additive capable of improving growth rate and non-specific immunity of prawns and application thereof

The invention provides a compound enzyme feed additive capable of improving growth rate and non-specific immunity of prawns and application of the compound enzyme feed additive. The additive comprises mannase, xylanase, cellulase, a saccharifying enzyme, lipase, alpha-amylase, beta-amylase and neutral protease. The components are compounded and proportioned with a special carrier and are added into prawn feed by an additive amount of 0.2-0.3%. The product is environmentally friendly, can be used for industrialized production on a large scale, and a novel growth feed additive is provided for aquatic feed. The compound enzyme feed additive provided by the invention can remarkably improve growth of penaeus monodon, has the purposes of improving true nutritive value and reducing the food coefficient, and has promoting effects to different extents to activities of intestinal amylase, lipase of hepatopancreas and serum SOD (Superoxide Dismutase). Compared with additives with similar functions, the additive provided