Preparation method of infant NFC fruit juice grain powder product and prepared infant NFC fruit juice grain powder product

The invention discloses a preparation method of an infant NFC fruit juice grain powder product and the prepared infant NFC fruit juice grain powder product. The preparation method comprises the steps:(1) first-time size mixing is conducted, specifically, one or more oligosaccharides are selected to be dissolved in water, and a sugar solution is obtained; (2) second-time size mixing is conducted,specifically, part of grain powder and mineral nutrients are adopted to be mixed into a mineral nutrient premix, remaining grain powder, part of ingredients and the mineral nutrient premix are added into the prepared sugar solution and mixed, and a second-time size mixing agent is obtained; (3) ripening and cooling are conducted, specifically, the second-time size mixing agent is heated to be ripened, and cooled; (4) third-time size mixing is conducted, specifically, remaining ingredient powder and vitamin nutrients are adopted to be mixed into a vitamin nutrient premix, the vitamin nutrient premix and NFC fruit juice