The present invention provides a formula of a cereal complementary food nutritious meal for infants having effects of strengthening spleen and tonifying stomach, promoting digestion and benefiting qi, moistening lungs and clearing heat, and supplementing needed minerals and vitamins for the infants in a growth period and a processing method thereof. The formula is as follows: rice is subjected to a saccharifying to enable starch to be hydrolyzed into dextrin, at the same time, lysozyme is added, endothelium corneum gigeriae galli is subjected to a salt stir-frying and a vinegar stir-frying, and then soybean flour, skimmed milk powder, crystal sugar, glucose, Chinese yam powder, lotus seed powder, celery powder, soybean protein isolate, whey proteins, fruit and vegetable powder, maltodextrin, compound minerals (calcium carbonate, zinc oxide and ferric pyrophosphate), multivitamins (vitamin A, vitamin D, vitamin B1, vitamin B2 and vitamin C) and other nutrients (DHA (docosahexaenoic acid), ARA (arachidonic acid), fructo-oligosaccharides, galactooligosaccharides, stachyose, probiotics and hydrolyzed whey proteins) are used as main raw materials. The processing method is combined with a steam roller drying technology, and the cereal complementary food nutritious meal for the infants is prepared by mixing.