Milk allergy grade 2 is mainly an allergic disease mediated by immunoglobulin E, in which the main allergens are casein and whey proteins. For children with milk allergy, it is recommended to drink deeply hydrolyzed milk powder and amino acid formula. 1, deeply hydrolyzed milk powder: deeply hydrolyzed milk powder is a special milk powder that cuts the large molecule protein and turns it into short peptide or amino acid structure, which is easier to be absorbed by the children, and it has no burden on the intestine, and it helps to maintain the intestinal health of the children. At the same time, this type of milk powder has the same nutritional composition as ordinary milk powder, which can also provide sufficient nutritional support for children, and is suitable for children with mild and moderate milk protein allergy. However, a small number of children do not respond well to deeply hydrolyzed milk powder, so we should pay attention to the adverse reactions when using it for the first time. 2. Amino acid milk powder: amino acid milk powder does not contain large molecules of protein, it is composed of free amino acids, which will not induce allergic reactions, and it is suitable for children with severe allergies. In addition, other animal milk powder, such as goat’s milk powder, contain a certain amount of casein, there is the possibility of cross-allergy, generally not recommended.