The time for babies to eat egg yolk is suitable at around 7-8 months. At this time to eat egg yolk can supplement the body nutrients, and adapt to the gastrointestinal tract digestive function, can meet the baby’s growth and development needs. Egg yolk is rich in protein content, the general baby 6 months can add complementary foods, has been able to digest and absorb the nutrients in the egg yolk, in 7-8 months or so can be appropriate to add egg yolk complementary foods for the normal growth and development of infants to supplement the adequate nutrition, and to promote physical health. However, complementary food should first add iron fortification of rice flour, followed by the addition of puree, puree, vegetable puree, etc., and then gradually add egg yolk after the addition of the above complementary food. Parents are advised to add egg yolks to infants in a gradual manner, from small to large amounts of egg yolks broken in porridge or added to soup supplements, if rashes, abdominal distension, bloody stools and other manifestations occur in the process of supplemental food addition, the addition of egg yolks should be immediately stopped and prompt medical treatment.