The invention discloses an adult sheep feed prepared by utilizing crop straw, and belongs to the technical field of feed preparation. The feed comprises the following raw materials in parts by weight:65-75 parts of peanut straw, 35-45 parts of sweet potato vines, 70-90 parts of sugarcane tail leaves, 60-70 parts of peanut straw, 35-45 parts of soybean straw, 45-65 parts of forage grass, 70-90 parts of dried small shrimp powder, 40-60 parts of soybean meal, 20-30 parts of rice bran, 10-20 parts of traditional Chinese medicine residues, 10-20 parts of compound strains, 10-14 parts of rice washing water, 5-10 parts of calcium carbonate, 10-20 parts of salt, 12-16 parts of an antioxidant, 12-14 parts of composite amino acid, 2-6 parts of microelements, and 8-12 parts of traditional Chinese medicine extract. The traditional Chinese medicine extract added in the adult sheep feed can effectively improve the percentage of neutrophils in the blood, that is, the traditional Chinese medicine extract can effectively improve nonspecific immunity of adult sheep, and reduce disease incidence.