Green stools in babies may be caused by imperfect digestive function, or may be related to pathogenic microbial infections. 1. Imperfect digestion: improper feeding of infants and young children can cause over-feeding or over-satiety, resulting in malnutrition or indigestion, causing diarrhea and leading to green stools. 2. Microbial infection (1) Rotavirus enteritis: rotavirus infection can cause diarrhea, and some children may have green stools, accompanied by fever, vomiting, abdominal pain and other symptoms. (2) Pseudomembranous enteritis: Clostridium difficile infection can cause pseudomembranous enteritis, the patient’s stools can be green watery stools, the child may also appear nausea, abdominal distension, fever and other symptoms. There are many reasons why babies have green stools, so it is recommended to go to the hospital, find out the cause and get timely treatment.