Green stool in infants and young children is one of the more common digestive symptoms, caused by a variety of reasons, generally with irregular diet, external environmental stimuli and intestinal infections and other close relationship, but the treatment of different causes is also different. First of all, dietary irregularities, including overfed or overstuffed, these two situations will stimulate the gastrointestinal tract to speed up peristalsis, causing gastrointestinal food to digest and absorb and appear, this situation requires adjusting the dietary structure, add appropriate complementary foods, change dietary habits through dietary adjustments, usually will be significantly improved. Children taking iron supplements with black-green stools do not need treatment. Secondly, external environmental stimuli, such as cold factors, mental stimulation can cause gastrointestinal tract dysfunction, need to pay attention to warmth, ease the mood while regulating the intestinal flora of the drug co-treatment. Once again, it is related to gastrointestinal infection, but usually it will be accompanied by abdominal pain, diarrhea, nausea, vomiting, fever and other symptoms, at this time, we need to carry out the relevant tests such as blood and stool routine, if there is any abnormality, then we need to carry out the anti-infective, rehydration and regulation of intestinal flora and other co-treatment. In conclusion, according to the different symptoms and causes of infants and young children, improve the relevant examination and adopt different treatment programs.