The intelligent microcapsule technology is to expand the special core material into a porosint under high temperature, so that it can absorb the active ingredients (certain feed additive or veterinary drug) sufficiently. And then, we can make the coating material evenly cover the surface of the core material using frozen spray drying technology to form the microcapsule with uniform texture. The diameter of formed microcapsule range from 120 to 1800ª¦m, it's about 10-20mesh. The active ingredient can be released constantly, controllably and (or) targetedly from the microcapsule under certain pH, enzymes or other specific conditions, such as in different sections of gastrointestinal tract of different animals, so that the active ingredient can play the best performance.