Advances in modern molecular biology and immunology have deepened our understanding of many diseases and led to new strategies for immunization. The use of transgenic plants to express vaccine antigens is one of the new attempts. Plant expression antigens have been shown to delay or prevent the occurrence of certain diseases. In the research of poultry edible vaccines, Giambrone of Auburn University successfully succeeded in bringing VPZ gene of bursal disease virus and S1 gene of viral arthritis virus into success. Expressed on plants. In the not-too-distant future, we can use this kind of plant to feed and feed chickens. The chickens can obtain certain immunity after eating, and no need to vaccinate the corresponding vaccine.