One year old baby only drink milk powder does not eat may be eating habits problems, zinc deficiency, etc., according to the specific reasons to choose the appropriate treatment. 1. Dietary habits: If you usually give your baby more milk powder, add complementary food too late, the diet structure will be a single situation, it is recommended to regulate the life, you can give your baby a complementary food when the baby is hungry, and then drink milk, and it is best to make the complementary food more delicious, and the variety should be as much as possible. 2. Zinc deficiency: if the baby lack of zinc will appear anorexia symptoms, there will also be backward growth and development, low resistance, etc., this situation should be supplemental zinc treatment, such as zinc gluconate, zinc sulfate and so on. All of the above drugs should be used under the guidance of a doctor, not blindly use their own to avoid adverse consequences.