It is applied to the surgical treatment of how to detach the pulmonary veins from the right atrium, reconnect them to the left atrium, repair the atrial septal defect (ASD), and restore the normal anatomical structure. The model reproduces the case in a 1:1 ratio, which can help doctors timely clarify the location and size of the atrial septal defect, define the classification and structure of anomalous pulmonary venous connection, and determine the surgical plan as well as conduct surgical drills.