Abstract:After the promulgation of “Prohibited Antibiotics”,and “substitutes for antibiotics” became a hot topic in the livestock industry.Cordycepin,the core active ingredient of Cordyceps militaris,has broadspectrum antibacterial,antioxidant and immunomodulatory functions,and has outstanding advantages such as natural materials and chemical components,less likely to develop drug resistance,and no harmful residues in vivo,which may contribute to the replacement of antibiotics.This article mainly reviews the sources,synthesis methods and pharmacological effects of cordycepin,and focuses on the application progress of cordycepin in pig husbandry,hoping to provide some reference information for the development of cordycepin products and their application in pig breeding.