Complete liquid-state fermented feed for fattening pigs and preparation method of complete liquid-state fermented feed

The invention provides a complete liquid fermented feed for fattening pigs and a preparation method thereof, and the preparation method comprises the following steps: adding water into high-humidity silage corn, and uniformly mixing to obtain a silage mixture; adding a pellet feed, a silage mixture, an exogenous enzyme preparation and a Chinese herbal medicine extracting solution into the fermentation tank with the remaining fermentation material of the previous batch, uniformly stirring, and standing at 40-50 DEG C for 2-4 hours; the method comprises the following steps: adding a lactobacillus plantarum liquid into a fermentation tank, uniformly stirring, and fermenting by stages at the fermentation temperature of 35-40 DEG C and the fermentation time of 3-4 hours in the first stage, and at the fermentation temperature of 25-34 DEG C and the fermentation time of 10-15 hours in the second stage. The fermentation method can effectively shorten the fermentation time and improve the fermentation efficiency on th