The invention relates to a universal concentrated feed for piglets and a preparation method thereof. The universal concentrated feed for piglets comprises the following components in parts by weight:small materials and large materials. The small materials comprise 6-9 parts of salt, 5-8.5 parts of 98-lysine, 1.5-4.5 parts of threonine, 1-4 parts of methionine, 0.02-1.5 parts of coated cysteaminehydrochloride, 0.1-1 part of phytase, 0.02-0.12 part of vitamin E, 0.02-0.12 part of biotin, 0.5-2.5 parts 95% coated vitamin C, 0.5-3.0 parts of piglet compound vitamins, 5.5-10 parts of piglet compound organic trace elements, 5.0-10 parts of a piglet compound organic acidifier, 1-3.5 parts of a special compound enzyme preparation for piglets, 15-55 parts of a compound microecological preparation, 1.5-5 parts of brewer's yeast, 6.0-12.0 parts of plant dietary cellulose, 1.5-5.5 parts of zymosan, 0.5-2.2 parts of iron glycine, 0.45-1.25 parts of zinc glycine, 3-7.5 parts of zinc oxide, 0.5-2.5parts of copper sulfate, 1.0-5.5 parts of calcium hydrophosphate, 7-15 parts of stone powder, 1.5-5.5 parts of choline chloride, 0.2-0.8 part of yeast chromium, 1.5-5.5 parts of sodium bicarbonate, 1.5-5.5 parts of potassium bicarbonate, 1.0-5.5 parts of sodium butyrate, 0.2-1.1 parts of a sweetening agent, 1.0-3.2 parts of ethoxy quinoline, and 0.6-3 parts of a mildewproof agent.