Immunoglobulin Y(IgY),as a potential therapeutic antibody,is present in many species,from lower amphibians and reptiles to higher animal birds.The development of vaccines has become a competitive arena for global scientists to compete against viruses.Although the vaccine can effectively prevent the infection of the virus,reduce the incidence and mortality of the disease,but the development of the vaccine is time-consuming and costly.IgY has the advantages of easy production,low cost,take effect quickly,and antibody therapy strategies basedon IgY have been widely recognized in recent years.This review fo-cused on the application of IgY in the treatment of viral diseases by reporting the latest research on the characteristics of IgY and the progress of production technology,so as to provide some enlightenment for the application of IgY in the treatment of viral in-fectious diseases.