Seven-month-old babies can eat egg yolks, which can supplement nutrition for the organism. Normally, 6 months old babies begin to gradually add complementary foods, should start with pureed vegetables, pureed fruits, iron-containing formulas, formula milk, to 7 months can add egg yolks, dilute (soft rice), formula milk, minced meat, minced vegetables, eggs, fish puree, tofu, fruits and other foods. The addition of complementary foods should follow the principles of from little to much, from one to many, from coarse to fine, from soft to hard. For such as egg white, peanuts, shrimp and crab, nuts and other highly allergenic food to be added after 1 year of age. Although 7-month-old babies can eat some egg yolks appropriately, they need to be ingested in a healthy state and in a gradual manner. 7-month-old baby is still relatively young, parents should pay more attention to care, should regularly take the baby to the hospital physical examination, to understand the state of health.