Abstract: The unreasonable use and abuse of antibiotics in swine farming not only lead to bacterial antimicrobial resistance, but also result in antibiotic residues in animal tissues and animal-originated food, posing a great threat to food safety. Under the background of ′prohibition of antibiotics in feed′ and ′reduction of antibiotics in animal farming′, the screen and development of novel typed feed additives without toxic and side effects have become a hot topic for the relevant researchers. Micro-ecological preparations, especially probiotics, have gradually been considered as the ideal alternative to antibiotic additives due to their green and safe advantages. Probiotics are a type of active microbial feed additives and bring multiple benefits to the host animals mainly through regulating their gut microbial balance. This paper reviews the research progress on the action mechanisms of probiotics and their application in swine production, in hoping to provide references for the scientific utilization of probiotics in swine farming.

Key words: probiotics, action mechanism, swine, research progress