The invention belongs to the technical field of complementary food nutritional supplement products, and particularly relates to a complementary food nutritional supplement product having the functionof improving absorption of intestinal tracts, and a preparation method of the complementary food nutritional supplement product. The complementary food nutritional supplement product having the function of improving absorption of intestinal tracts, provided by the invention, mainly consists of whey protein hydrolysates blending milk powder, whey protein concentrate powder, livetin powder, full-fatgoat milk powder, tricholoma matsutake powder, hericium erinaceus powder, protein polypeptide, fructo-oligosaccharide, stachyose, a malt extract, minerals and vitamins. The complementary food nutritional supplement product having the function of improving absorption of intestinal tracts, provided by the invention, is reasonable and scientific in formula, is researched according to the intestinaltract characteristics of babies, contributes to absorption and utilization of the babies to protein, can enhance the immunity of the babies, guarantees the nutrient absorption rate of the babies, canalso improve the intestinal tract environment of the babies, and is a complementary food nutritional supplement product for the babies, which is high in nutrient, healthy and free from side effects.