Complex microbial inoculant as well as fermented product and application thereof

The invention belongs to the technical field of microbial engineering, and particularly relates to a complex microbial inoculant as well as a fermented product and application thereof. The invention provides a complex microbial inoculant. The complex microbial inoculant comprises bacillus subtilis, rhodotorula mucilaginosa and bacillus siamensis. The bacillus subtilis can inhibit escherichia coli, staphylococcus aureus, salmonella typhimurium and shigella, the rhodotorula mucilaginosa can inhibit escherichia coli, staphylococcus aureus and shigella, and the bacillus siamensis can inhibit escherichia coli, staphylococcus aureus, salmonella typhimurium and listeria monocytogenes. The bacillus subtilis, the rhodotorula mucilaginosa and the bacillus siamensis are mixed, so that multiple pathogenic bacteria can be inhibited, the inhibition effect on the multiple pathogenic bacteria is improved, the livestock diarrhea is well inhibited, and the collective immunocompetence and digestion and absorption capacity of li