The invention discloses an antibiotic-free feed for fattening-stage pigs. The antibiotic-free feed for the fattening-stage pigs comprises the following components in parts by weight: 40-50 parts of corns, 20-25 parts of barley, 17-20 parts of bean meal, 8-12 parts of whole rice bran, 6-8 parts of an organic compound acidifying agent, 2-5 parts of imported corn DDGS, 0.3-0.4 part of table salt, 1-1.5 parts of stone powder, 0.3-0.5 part of calcium hydrogen phosphate, 0.3-0.5 part of amino acid, 0.05-0.1 part of choline chloride, 0.03-0.1 part of a compound micro-ecological preparation, 0.02-0.05 part of an antioxidant, 0.03-0.04 part of vitamin premix, 0.1-0.15 part of organic mineral premix, 0.002-0.005 part of a compound enzyme preparation, 0.02-0.05 part of high-temperature-resistant phytase, 0.004-0.01 part of plant essence oil, 0.15-0.2 part of yeast cell walls, 0.01-0.03 part of an antioxidant, 0.02-0.05 part of an anti-mildew agent and 0.02-0.05 part of zeolite powder. The invention solves the problems of drug residues, drug resistance and environmental pollution caused by addition of the antibiotics in the feed. Moreover, the acidifying agent, the organic trace elements, the yeast cell walls and the plant essence oil are added into the feed, so that the feed has the effects of improving pig immunity and reducing disease risks of animals compared with antibiotic-containing feeds; and the feed is capable of improving production performance and meat qualities of the pigs.