Fermented mulberry leaves have extremely high nutritional and economic value,widely used in food,animal husbandry and many other fields.However,there are few related studies on the bioactive substances of fermented mulberry leaves,which is not conducive to the full utilization of mulberry leaves resources.This paper reviewed the physiological function of bioactive substances in mulberry leaves,the effect of fermentation on bioactive substances and the application of fermented mulberry leaves in animal production,which could be used as references for the r...