The causes of pediatric constipation are diverse, generally based on gastrointestinal diseases, which can usually be divided into functional constipation, drug-related factors and organic lesions, in addition to certain systemic diseases and infectious diseases can also lead to pediatric constipation. Functional constipation is mainly caused by improper diet, poor diet, low food intake or lack of coarse fiber in food, or due to the failure to form good bowel habits in daily life, which can be seen in children with gastrointestinal disorders who are also prone to constipation. Drug constipation is mainly related to the use of some drugs, many drugs in large quantities or long-term use of adverse reactions usually manifested as constipation, etc.. There are more causes of organic lesions of the gastrointestinal tract, such as intestinal obstruction, rectal and anal diseases causing spasm of the anal sphincter, gastrointestinal tumors, rectal polyps, etc. Finally, systemic diseases and infectious diseases can also cause, such as fever, respiratory tract infection, endocrine disorders, etc. In short, constipation has more causes, according to the specific causes of specific treatment, usually develop a good diet and living habits, do not take drugs, appropriate activities and exercise, if necessary, colonoscopy, clear diagnosis and treatment.