Pediatric anorexia is common from 4-7 months of age, as well as around 1 year of age, with a high degree of individual variability in duration, which may be around 1-2 months. Usually 4-6 months old infants, with increasing curiosity and better neck muscle tone, begin to feel novelty about things around them, leading to distraction from eating. At the same time, anorexia can often occur during this period because the main food is mainly breast milk or infant formula. In addition, around the age of 1 year, most of the fetus has already teethed, and complementary food is almost solid food, and the child may reject solid food, so anorexia is also easy to occur. Anorexia usually lasts for about 1-2 months, but it varies from person to person. Failure to add complementary foods appropriately during the critical period of complementary feeding and to train the infant’s oral coordination with spoon feeding will also lead to reluctance to eat solid foods and apparent anorexia later in life. In conclusion, it is necessary to pay attention to eating regularly and quantitatively during infancy, and to control snacks. At the same time, we should pay attention to physical exercise and increase the time for outdoor activities.