Drinking milk powder green stool may be iron malabsorption, abdominal cold, indigestion, diet and other factors. 1. Iron malabsorption: the baby usually just simply drink milk powder, young baby gastrointestinal function development is not perfect, milk powder iron is more, iron can not be fully absorbed by the gastrointestinal tract, there will be the performance of the green stools. 2. Abdominal cold: the baby did not pay attention to the warmth of the abdomen, abdominal cold caused by gastrointestinal tract dysfunction, may have a green stool performance. 3. Indigestion: babies with indigestion caused by improper feeding, gastrointestinal inflammation, and an imbalance of probiotics in the intestines may also have green stools. 4. Dietary factors: the baby after 4 to 6 months has been added to the complementary food, diet to eat more green leafy vegetables, can not be fully digested and absorbed by the gastrointestinal tract, there will also be a performance of green stools. The reason why the baby drink milk powder green stool is more, serious advice timely medical, clear cause, active treatment, so as not to delay the condition.