The invention provides a process for producing forage micro ecologic preparations by a multi-bacteria solid fermentation beer draff and a fermentation culture medium for the preparations. Delbrueckii subsp bulgaricus (preservation no. CCTCC M 207096), bacillus subtilis (preservation no. CCTCC M 207097) and saccharomyces paradoxus (preservation no. CCTCC M 207098) are respectively inoculated to corresponding liquid culture media, cultured 18-24 h thermostatically under 37 DEG C; then the suspension fluids are inculcated in certain proportion into a disinfected solid fermentation culture mediataking beer draff as main raw materials, fermented for 36-48h under 30-34 DEG C, and frozen dry. In this way the forage micro ecologic preparations are got. The production process in the invention isof low investment, low energy consumption, high yield and free from pollution from waste fluid, and opens a new means for changing waste into a treasure for beer draff.