The invention discloses a compound bacterium fermented feed for preventing bacterial intestinal diseases and a preparation method of the compound bacterium fermented feed, and belongs to the technicalfield of feeds. The preparation method comprises the following steps: firstly, uniformly mixing rice hull powder with corn flour, soybean meal, bran, brown sugar, lactobacillus acidophilus and saccharomyces cerevisiae in proportion in sequence, and performing primary solid-state fermentation to obtain an enzyme A; and secondly, uniformly mixing the rice hull powder with the corn flour, the soybean meal, the bran, calcium powder, the enzyme A, bacillus subtilis and bacillus licheniformis in proportion in sequence, performing secondary solid-state fermentation, and adding an antibacterial peptide preparation to obtain the compound bacterium fermented feed. According to the feed, the optimal synergistic effect among strains is achieved through a specific ratio and a specific process, the metabolic characteristics of various strains are guaranteed, various active products of microorganisms for inhibiting animal intestinal pathogenic bacteria are accumulated to the maximum extent, the physical and chemical properties, the palatability and the nutritional value of the feed are improved, the problem of feed pollution is solved, and the beneficial effects of preventing bacterial intestinal diseases and protecting animal intestinal health are achieved.