Minimally invasive atrial septal defect surgery is performed via cardiac catheterization, with atrial septal repair performed under cardiac catheterization, mainly in the form of patch repair and direct suture repair. If the septal defect is relatively small, it can be repaired by direct suturing, which is relatively inexpensive but increases the septal tension and increases the likelihood of postoperative dislocation and poor healing. If the atrial septal defect is larger, it can be repaired with a patch, which has less postoperative tension and fewer postoperative reactions, but as a foreign body, the patch may be rejected by the body, thus inducing local inflammation. The choice of the specific surgical approach needs to be judged by the surgeon according to the actual condition of the child.