With the aggravation of environmental pollution and unsafe food hygiene, the incidence of anorectal malformation diseases is increasing year by year. Many children with low anorectal malformations cannot be detected in time after birth, and parents and primary care obstetricians fail to recognize them in time. Many children with abdominal distension and difficult bowel movements that occur within half a year after birth are carefully examined anally, and some of them have a slightly abnormal anal position, partly as stenosis of the anal opening, which is in fact a low anal cutaneous fistula with a fistula opening, not a normal anus, and all of these children require surgical management. The incidence of secondary megacolon and malnutrition gradually increases after the age of half a year, and postoperative recovery is slow with more complications. Therefore, parents of newborns with recurrent postnatal abdominal distension and defecation difficulties need to consult a pediatric anorectal surgeon in a timely manner.