Feed premix refers to a uniform mixture of one or more additive raw materials and a carrier or diluent. It is divided into three types: compound premix, trace mineral premix and vitamin premix. Compound premix is a homogeneous mixture made by mixing various types of feed additives with carriers or diluents according to formulas and actual requirements. Such as premixes in which trace elements, vitamins and other ingredients are mixed together. During the growth and reproduction of animals, protein, sugar and fat are essential nutrients. In order to achieve the best breeding benefits, some macro and micro substances are essential, so premixes are often used.