The invention relates to a functional concentrated feed for lactation period of sows, which is prepared from the following raw materials in parts by weight: choline chloride, betaine, probiotics, phytase, a vitamin premix feed for the sows, an antioxidant, threonine, colippine, bone strengthening elements, yeast hydrolysate, fuyou, baking soda, a trace element compound premix feed, soybean meal, stone powder, monocalcium phosphate, dicalcium phosphate, dietary fibers, sodium chloride, extruded soybeans, fish meal, soybean oil, lysine and a special nutritional agent. By improving a traditional concentrated feed formula and adding the special nutritional agent into the feed, gastrointestinal functions of the sows in the lactation period are improved, the feed intake of the sows is increased, and high-concentration nutrition intake of the sows in the lactation period is ensured, so that the lactation capability of the sows is improved, the litter weight of weaned piglets is increased, meanwhile, the weight loss of the sows in the lactation period is reduced, and the oestrus interval of the sows is shortened.