Abstract:As a new resource food with homologous medicine and food，ginseng has rich nutritional value，and research on ginseng fermentation technology has been concerned by people. This paper summarized the mechanism of ginseng fermentation，and introduced the types of common ginseng and the changes of saponin content and its pharmacological effects before and after fermentation. The optimal process of ginseng fermentation was summarized from the aspects of strain selection and fermentation environment factors. The research status of ginseng fermentation products was analyzed，which provided reference and basis for further research of fermented ginseng food.