Intussusception is a kind of intestinal obstruction, belonging to mechanical intestinal obstruction, a pathological type of intestinal obstruction, mostly seen in children under two years old, which refers to the intestinal tube lodging into the connected intestinal tube, thus causing clinical symptoms such as paroxysmal abdominal pain, bloody stools, and formation of abdominal mass, etc. Infants and young children below the age of two years old mainly manifest paroxysmal abdominal pain, which leads to paroxysms of crying and restlessness, passing of jam-like stools, and accompanied by nausea and vomiting. Barium enema is crucial in intussusception, not only as a diagnostic method, but also for therapeutic purposes, and even surgical treatment when the condition is serious.