The invention belongs to the field of feed premixes and relates to a 4% functional non-antibiotic piglet premix. According to a formula, the premix is prepared from the following components in parts by weight: 10-20 parts of astragalus membranaceus, 10-20 parts of coptis chinensis, 8-12 parts of pulsatilla chinensis regel, 0.3-2 parts of mannan oligosaccharide, 0.15-3 parts of chitosan oligosaccharide, 1.5 parts of table salt, 2.5 parts of baking soda, 2.5 parts of lysine, 2.5 parts of methionine, 1 part of threonine, 1.25 parts of ethoxyquinoline 30, 2.5-12.5 parts of yeast nucleotide, 3 parts of an acidifying agent, 0.2 part of a sweetening agent, 2.75 parts of mountain flour, 2.5 parts of calcium hydrogen phosphate, 0.25-1.5 parts of sodium glutamate, 0.25 part of high-temperature-resisting phytase 5000, 0.2 part of a mildew preventive, 0.25-1.5 parts of a compound micro-ecological preparation, 12.5 parts of a microelement additive, 2.5 parts of a vitamin additive and 5-20 parts of zeolite powder. The functional nonreactive piglet premix provided by the invention has the advantages that the immunity of piglets is enhanced, the disease occurrence rate is reduced, the diarrhea of the piglets is reduced, the feed intake and the daily gain of the piglets are increased, the survival rate of the piglets is high, the growth speed is high and the like.