Lentinan is a natural active ingredient isolated from the fruiting body of lentinus edodes, with many functions such as anti-inflammatory, anti-oxidation and intestinal health. It is used in livestock and poultry production to improve the performance of livestock and poultry and enhance immunity. In this paper, the physiological functions and mechanism of lentinan and its research progress in chicken and pig production are reviewed. The aim is to provide reference for the further ap...