Pig complete fermented feed and preparation method thereof

The invention discloses a pig complete fermented feed preparation method and an application thereof. A pig complete fermented feed comprises the following main components: 60-70.5% of corn, 13-27% of soybean meal and the balance of wheat bran. The strain is composed of mixed lactic acid bacteria, saccharomyces and bacillus according to a ratio of (2-3):(1):(1). The fermented feed is prepared by performing solid state fermentation on a low-nutrition complete feed, molasses and multiple strains, can be used for feeding and nursing, pigs at multiple phases such as growth and pregnancy. The feed combines multi-phase physiological characteristics of pigs and aims at problems of component, nutrition and production of the pig feed at a current specific phase, the pig complete fermented feed can be prepared by using combination fermentation of the specific strains, nutrition value of the feed with low cost is increased, mycotoxin and antinutritional factors are reduced, usage of veterinary drug is reduced, culture co