Abstract:As a new type of roughage with wide material source,low production cost and easy storage,fermented feed is widely used in livestock production.Research has found that fermented feed has the advantages of green environment,improving the rumen fermentation environment,promoting animal growth,and reducing feeding cost.Therefore,the characteristics of fermented feed and its application advantages in sheep breeding production were comprehensively described in this paper,and its effects on the growth performance,health status and breeding environment of sheep were discussed,and the future development trend was prospected,in order to provide reference for the further application of fermented feed in sheep.