The invention relates to concentrate supplement for ewes in a suckling period and a preparation method for the concentrate supplement. The concentrate supplement is prepared from corns, corn-soybean meal, sunflower seed meal, DDGS (distillers dried grains with soluble), flax cake, soybean skin, feeding microecologics, limestone, calcium hydrogen phosphate, magnesium oxide, sodium bicarbonate, rumen-protected methionine, salt, rumen-protected choline chloride, molasses, a mold removal agent and an ewe premix by matching. The concentrate supplement has the characteristics of balanced and comprehensive nourishment, strong pertinence and the like, can meet nutritional needs of the ewes in the suckling period and lambs before weaning, and can improve intestinal health of the ewes, improve immunity of the ewes, ensure milk quality of the ewes, promote quick development of the lambs, improve fertility of the ewes and shorten non-pregnant period.