The invention discloses a complementary food nutrition bag for children and a preparation method of the complementary food nutrition bag and belongs to the complementary food nutrition supplements. The complementary food nutrition bag is characterized by being composed of ethlene diamine tetraacetic acid ferric sodium salt, vitamin B1, vitamin b2, vitamin A acetate, cholecal ciferol, ferric pyrophosphate, zinc gluconate, lupeose, malt extract and resistant dextrin. The complementary food nutrition bag has the advantages and beneficial effects of reasonable matching, exact effects, clear mechanism, strong pertinence, remarkable synergic effect, simplicity in production and convenience for taking; the complementary food nutrition bag for children has no adverse effects in the aspects of color and luster, taste, stability and the like, and has no black spots, precipitate and flotage; besides, the product also can be prevented from oxidation smell and the like in short period, and the quality guarantee period can be 24 months; the complementary food nutrition bag is easily accepted by infants, and free from any preservative, essence and the like, completely conforms to the national food safety standards and does not cause any harm or toxic and side effects to the body.