Recently, many patients who came to our department were confused about whether their atrial septal defect should be treated surgically or by interventional blocking. Age older than 3 years, atrial septal defect larger than 5 mm in diameter, with increased right heart volume load, secondary foramen ovale type left-to-right shunt atrial defect less than or equal to 36 mm in diameter; distance from the edge of the defect to the coronary sinus, superior and inferior vena cava and pulmonary veins greater than or equal to 5 mm, distance to the atrioventricular valve greater than or equal to 7 mm, diameter of the atrial septum larger than the diameter of the left atrial lateral disc of the selected blocker; no combination of surgical procedures necessary Other malformations; residual shunt after atrial defect surgery. Contraindications to interventional occlusion: primary foramen ovale, venous sinus atrial defect; endocarditis and hemorrhagic disorders; severe pulmonary hypertension leading to right-to-left shunts; severe myocardial disorders and valvular disease unrelated to atrial defect; allergy to metals. In conclusion, all atrial defects that can be treated surgically can be treated surgically, while those that can be treated surgically may not necessarily be blocked by intervention. The above are the indications and contraindications of interventional blocking treatment for atrial septal defect, and we hope that they will be helpful to all new and old patients, so that they can have a good idea of how to choose the treatment.