Constipation is one of the most common symptoms in pediatric bowel function. It accounts for three to five percent of outpatients and twenty-five percent of GI disorders. Constipation is a group of clinical syndromes, not independent disease, children constipation causes, factors and mechanisms of influence are complex, far-reaching impact on the quality of life of the child. The prevention and treatment of constipation 1, diet therapy: than the method is preferred. Increase the content of fiber in the dietary formula. As fiber itself is not absorbed, it can make the stool swell and stimulate colon dynamics, especially for picky and paranoid children, which is more effective. for children with constipation within 1 year old, increase pear juice, orange juice, red date puree or crushed fried black sesame seeds with honey, 1-2 spoons that day. for children with constipation over 2 years old, give kelp, sweet potato, groundnut, pear, grapefruit, leek, red dates, radish, etc., which are conducive to defecation. The diet of the child. In addition, drink a glass of yogurt that day, yogurt contains lactic acid bacteria can regulate the intestinal flora. 2, training to establish regular bowel habits: children over 3 months of age should be trained to defecate at a fixed time every day. For children over 3 years old, they can sit on the potty for 5-15 minutes on time after breakfast. Strengthen the conditioned signal of defecation reflex and gradually develop the habit of regular defecation. Adults do not need to forcefully suppress when children have the intention to defecate, so as not to suppress the intention and defecation movements and destroy the defecation habit. 3, appropriate application of enemas and cylinder expansion: long-term dry stool leads to serious intestinal tube dilatation, fecal accumulation, and even the formation of huge fecal stones, serious dysbiosis of the intestinal flora environment, whether colon, rectum, or anal canal are not in the normal physiological state, unable to restore the potential defecation control function. Therefore, evacuation of the bowel is essential for the treatment of constipation. It is part of the treatment of constipation and is a prerequisite and condition for the implementation of other treatments. Dilation can be used as a non-invasive, easy-to-use treatment option. When starting dilation in children with constipation, an anal tube coated with paraffin oil can be inserted into the anus to a depth of about 10-11 cm, followed by squeezing 2 opiates into the intestine and performing a retention enema to drain the stool from the deeper part of the intestine. Dilation can be increased to 2 times a day, 20 minutes in the morning and 30 minutes in the evening, clean enema once in 2-3 days if necessary, and then dilate once a day after the constipation and bloating improves. 4, drug treatment: where the above treatment is effective constipation children, need to be careful with drug therapy. Forcing, treatment is not effective for children, should be considered for constipation caused by organic diseases. Such as anal stenosis, congenital megacolon, congenital megacolon homozygosis or anal stenosis after anoplasty, neurogenic constipation, etc. should go to the pediatric surgery for relevant examination and treatment, and if necessary, surgery.