Abstract: Although complementary food can be added to infants aged from 7 to 12 months, their main energy source is still breast milk. The growth and development rate of infants aged from 7 to 12 months is still very fast, and their stomach volume and empting time will change rapidly. Energy intake in infants and young children has an important impact on the growth and development of infants and young children. If intake is too little, the growth will be delayed, and too much intake will increase the risk of diabetes and cardiovascular and cerebrovascular diseases in adults. Therefore, this paper studies the energy needs of older infants aged from 7 to 12 months, which can provide theoretical guidance for the design of infant complementary food and formula food for older infants.

Key words: older infants, energy, baby food, design principle