Breastmilk is not good for children at the age of five, mainly for the following reasons: first, due to the nutritional composition of breastmilk. Because when children are five years old, the nutrients in breastmilk are relatively small and cannot meet the needs of children’s growth and development, so it is not very suitable to give children breastmilk again. Secondly, it will cause children to be too dependent. Because children are already five years old, the relative independence should be better, to be separated from the mother’s breast milk, otherwise it will cause too much dependence, is not conducive to the physical and mental health of children. Finally, it will cause children’s dietary disorders. If a five-year-old still eats more breast milk and relatively little solid or semi-solid food, it will cause malnutrition in children.