The invention relates to the technical field of feed production, in particular to fermented feed for cattle and sheep. A production method of the fermented feed includes the steps of firstly, sortingmain raw materials and auxiliary raw materials, wherein the sorting comprises screening and magnetic separation; the main raw materials comprise straw powder, melon vine powder, pomace, bagasse, chaffpowder and mixture of rice chaff and husk; the auxiliary raw materials comprise rapeseed meal, cottonseed meal, bean pulp and castor cake. The fermented feed has the advantages that additives are added into the fermented feed, fermentation is performed, the medicinal effect and value of the additives can be improved through the fermentation, livestock's probability of having diseases can be reduced if the livestock is fed with the fermented feed for a long time, and meat quality can be improved at the same time.