Atrial septal defect sealing is ideal for most patients with congenital atrial septal defect treatment outcomes. If we measure the benefits of occlusion to patients far outweigh the disadvantages, and the complications associated with atrial septal defect occlusion include: i. Postoperative cardiac hemodynamics and symptoms do not improve significantly and may require secondary surgical treatment; ii. Individual occurrence of premature atrial beats or conduction block requires treatment with antiarrhythmic drugs; iii. Serious complications can occur with air embolism and atrial perforation, which are fatal or disabling. Therefore, it is recommended that patients with atrial septal defect should improve electrocardiogram, cardiac ultrasound, coagulation series and other laboratory tests, and fully conduct preoperative evaluation to see if they are suitable for blocking surgery; physicians need to strictly standardize operation during surgery to avoid uncomfortable complications after surgery, and cases not suitable for blocking can be transferred to open-heart repair surgery, instead of blindly pursuing blocking surgery as a means.