Intussusception is a part of the intestinal tube and its adjacent mesentery snapping into the nearby intestinal lumen, forming a strangulated intestinal obstruction. The age of onset is most common in infants under 2 years of age, especially in infants 4-10 months of age. The incidence is two to three times higher in boys than in girls. There is also a relationship between season and climate and morbidity, with spring being the most common, probably related to the high number of pediatric upper respiratory tract infections and adenovirus infections during this period. Summer and winter are the next most common, and autumn is relatively uncommon. Non-surgical treatment of intussusception in children has become the accepted method of choice, and gas enema under X-ray fluoroscopy and water enema under ultrasound surveillance are the main treatments for non-surgical intussusception. Under X-ray fluoroscopy or ultrasound monitoring, the gas or liquid is injected into the anal canal by an automatically controlled pressure instrument. At present, the gas enema reset rate has reached about 90% in China. If the baby’s onset is too long, has reached an advanced stage, or if enema treatment is carried out but not successful, or if intussusception is recurrent for more than 3 times or if intestinal canal lesions are suspected, surgery should be carried out immediately. Although intussusception is rare, because its prognosis is closely related to the early or late detection, it is important to take the child to the doctor when you find that the child’s crying is different from the past and that the crying is particularly severe. It is best to choose a hospital with pediatric ultrasound and pediatric surgery. Some general hospitals are not very familiar with ultrasound diagnosis of intussusception, or do not have a pediatric surgery department that can perform enemas quickly after diagnosis, and then transfer to other hospitals will be more delayed, the timing of treatment is crucial to the prognosis of intussusception.