Galactooligosaccharide is a kind of natural functional oligosaccharide, which mostly exists in trace amount in animal milk. It has good Bifidobacterium proliferation activity and is a high quality prebiotic. This product is conducive to the establishment of Bifidobacterium flora in non breast fed infants, improve the digestive function of infants, promote intestinal peristalsis, prevent constipation, promote calcium absorption in the body, and enhance immunity.