Intussusception is a segment of the intestine that is trapped in the lumen of the intestine to which it is attached and causes obstruction to the passage of intestinal contents. Intussusception often accounts for 15% to 20% of intestinal obstruction. Acute intussusception is common in clinical practice, while chronic intussusception is usually secondary. Acute intussusception is a unique disease in infancy, and it is common in infants aged 4-10 months, and the incidence decreases with age after 2 years. Intussusception can occur throughout the year, with the highest incidence in late spring and early summer, and may be related to upper respiratory tract infection and lymph node virus infection.