The invention provides a concentrate supplement suitable for breast-fed colts. The concentrate supplement comprises 1-80 parts of corn, 6-30 parts of bran, 10-50 parts of soybean meal, 0.05-10 parts of calcium hydrogen phosphate, 0.1-10 parts of stone flour, 0.05-5 parts of table salt, 0.05-5 parts of lysine, and 0.01-8 parts of a premixed material; and the concentrate supplement is made into particles with the particle size of 4 mm and directly used for feeding. The premixed material comprises 0.5-10 parts of manganese sulfate, 1-10 parts of ferrous sulfate, 0.05-5 parts of copper sulfate, 0.5-12 parts of zinc sulfate, 0.1-8 parts of cobalt chloride, 0.05-5 parts of potassium iodide, 0.05-10 parts of sodium selenite, 0.02-7 parts of vitamin A, 0.001-2 parts of vitamin D3, 0.02-10 parts of vitamin E, 0.003-4 parts of vitamin B2, 0.05-8 parts of niacinamide, 0.01-5 parts of calcium pantothenate, 0.03-6 parts of vitamin B6, 0.001-5 parts of vitamin B1, 0.05-6 parts of biotin, 0.06-8 parts of vitamin C, 0.5-10 parts of aureomycin, and 30-80 parts of bentonite. The breast-fed colts are fed for 2 times a day, and in each time, the breast-fed colts are additionally fed with 0.025-2.5 kg of the concentrate supplement based on 100 kg of the weight.