Intussusception is a type of intestinal obstruction caused by a segment of the intestine entering the adjacent intestine. Pediatric intussusception is one of the most common emergencies in pediatric surgery. It is more frequent in late spring and early summer. The incidence is higher in boys than in women. It is most common in infants under the age of 1 year, with the most frequent occurrence at the age of 4-7 months, and decreases with age after 2 years, and is very rare after the age of 5 years. Etiology: The etiology of intussusception is still not well understood. The factors associated with the development of intussusception are: dietary changes and food stimulation, local anatomical factors of the intestine, disorders of the vegetative nervous system, intestinal spasm, viral infection, immune response factors, etc. Pathological typing: pathological typing of intussusception: small intestine type, colon type, ileocolic type, ileo-caecum type, ileo-ileo-knot type, and multiple types. Pediatric intussusception is most common in the ileocolic type, accounting for about 70% to 80%. Clinical manifestations: 1, abdominal pain abdominal pain for the earliest symptoms, often sudden onset, crying and restless. The child’s fists are clenched and moved around, the legs are flexed and curled, the face is pale, while refusing to eat. The abdominal pain is paroxysmal and lasts for several minutes each time. After the attack, the whole body is relaxed and quiet, and can even fall asleep, but the attack is repeated after an interval of 10 to 20 minutes; so repeatedly that the child finally becomes exhausted and can only moan, and enters a semi-sleepy state with no power to struggle. The abdominal pain of intussusception occurs in about 90% or more. 2, vomiting About 80% of the sick children appear vomiting, vomiting milk, milk lumps or other food. The vomiting is infrequent, gradually vomiting bile (yellow-green), and in the late stage may contain feces. 3, bloody stool Most of the blood stool in 8 to 12 hours after the onset of the disease, the content of the sticky jam-colored stool or a mixture of blood and mucus jelly stool. Sometimes crimson blood, indicating serious damage to the intestinal wall, non-surgical reset should be particularly cautious. 4, abdominal manifestations about 75% of the children can find salami-shaped swelling, slightly hard and tough feeling. The child has discomfort when the mass is touched, and sometimes the abdominal muscles are reactive and tense. After 24 hours, the condition gradually deteriorates as the symptoms worsen. The child is indifferent, depressed, drowsy, pale, and severely dehydrated. The body temperature often rises above 39°C and the pulse rate increases. 48 hours later, the diaphragm is elevated due to severe abdominal distension, which affects breathing. After the occurrence of intestinal necrosis, signs of peritoneal irritation and abdominal muscle tension appear. The child’s systemic toxicity symptoms are increasing, pulse rate is fine and rapid, fever is above 40°C, coma, shock, failure and death. Surgical treatment: Surgery is recommended for those who have failed air enema, or have other intestinal disorders in combination with late stage, repeated recurrence, or habitual intussusception. Before surgery, adequate preparation should be made. In severe cases, dehydration and acidosis should be corrected first, blood or plasma transfusion should be given if necessary, and body temperature should be controlled. Otherwise, hyperthermic convulsions and high mortality rate are likely to occur after surgery.