The invention provides a 
nutrient supplement for first-delivery sows, and belongs to the technical field of breeding of first-delivery sows. The 
nutrient supplement comprises 100-200 parts of poly-
isomaltose, 100-200 parts of baking soda, 50-100 parts of probiotics, 60-150 parts of 
chitosan oligosaccharides, 100-150 parts of L-
Lysine monohydrochloride, 50-100 parts of 
methionine, 50-120 parts of 
calcium lactate, 0.1-0.3 part of 
zinc glycinate, 0.08 -0.12 part of 
manganese glycinate, 0.01-0.03 part of cupric glycinate, 50-100 parts of an 
acidulant, 150-200 parts of 
vitamin E, 10-15 parts of 
vitamin A, 2-3 parts of 
vitamin D3 and 10-500 parts of 
silicon dioxide. A preparation method of the 
nutrient supplement comprises the following steps of weighing the components in parts by weight, sequentially adding the components in parts by weight to a mixing 
machine in the sequence from the big components to the small components, performing uniform mixing, and performing subpacking with a non-toxic bag. According to the nutrient supplement, the physical development of the first-delivery sows can be promoted, the firstborn stress of the first-delivery sows can be reduced, the body storage of the first-delivery sows can be strengthened, the 
food consumption of the sows at the early period of a 
lactation period can be increased, the 
disease resistance of the first-delivery sows at a 
perinatal period can be strengthened, the syndromes of the sows for second 
pregnancy can be alleviated, the service life of the sows can be prolonged, and the 
rejection rate of the sows can be reduced.