The first answer to this question is yes, one year old babies can drink pure milk, as long as they are in good health, there is no problem to drink pure milk. However, I need to emphasize that one year old babies have changed their body structure, gastrointestinal function and diet structure, their diet is already whole food, then the gastrointestinal function is also able to digest the daily food, so the main source of nutrition is in the food, not just milk. Milk is only an auxiliary food, given to add when needed, and cannot be generalized, so the key to diet is to be reasonable. In addition, the nutritional content of pure milk after one year old, can not fully meet the needs of the growth and development of one-year-old babies, after all, cow’s milk can not replace human milk. Because of its nutrients and nutrients, the proportion of absorption is very different from human milk, so a long time with cow’s milk instead of human milk, will affect the absorption of nutrients in the baby.