ObjectiveThough investigating the causes of untreated congenital heart disease among children aged 3–14 years in Panzhihua city, to provide the basis for formulating intervention measures in the next step.MethodsA survey was conducted on the children aged 3 to 14 years in Panzhihua city from March 2015 to December 2017. The causes of untreated congenital heart disease were analyzed. Results Of 148 children with untreated congenital heart diseases, 82 were found to have congenital heart disease or heart murmur before screening. Among them, 59 parents (71.95%) thought that hospitalization was expensive; 42 parents (53.84%) thought that their children were asymptomatic and did not need treatment. Doctors suggested that 13 children (15.85%) be observed. Sixty-six patients of congenital heart disease were found for the first time in this screening, with an average age of 7.11±1.23 years. The patients in the rural population (n=44, 81.82%) were significantly more than the patients in the urban (n=12, 18.18%, P<0.01). Atrial septal defect ranked the first among the diseases, and 45 (68.18%) children did not regularly participate in child health care after birth.ConclusionMost families with untreated congenital heart disease in Panzhihua city think that the cost of treatment is high and there is no need for treatment. And most of them do not participate in child health care regularly. Atrial septal defect ranks first among the diseases. Free screening and treatment of congenital heart disease is of great significance in Panzhihua city.