There are various types of intestinal malformations, such as congenital rectoanal malformation, congenital megacolon, and congenital duodenal atresia and stenosis. They produce different symptoms after the fetus is born and most of them require surgical treatment. 1. Congenital rectoanal malformation: it is a common intestinal malformation in pediatric surgery. Clinical manifestations are no meconium or very little meconium, the newborn cries and vomits, electrolyte disorders and other symptoms can occur, and in severe cases, it can lead to intestinal necrosis, intestinal perforation, causing peritonitis and death, which requires surgical treatment. 2. Congenital megacolon: it is a common congenital disease in children. After birth, the fetus manifests constipation and abdominal distension, and when constipation is severe, intestinal obstruction can occur, often complicated by intestinal infection symptoms, usually requiring surgical treatment. 3. Congenital duodenal atresia and stenosis: the fetus is born with abdominal distension, vomiting, jaundice, constipation, etc. The constant vomiting can cause dehydration, electrolyte disorders, etc., which need surgical treatment. Fetuses with intestinal malformations should be consulted promptly after birth and given treatment under the guidance of specialized doctors, and should not be delayed to avoid serious adverse consequences.