Care after interventional treatment of atrial septal defect is very important, and good care can help reduce complications and facilitate the patient’s recovery. After interventional treatment, attention should be paid to monitoring respiratory rate, blood pressure, pulse rate, heart rate, etc. Also, more water should be drunk, preferably at least 1000 ml of water within 6-8 hours. After the operation, patients should eat more easily digestible food such as fish porridge and lean meat porridge, while they should eat more vitamin-rich fruits such as bananas and apples, and not eat foods that produce gas such as milk and soy products. Patients should be told to take aspirin for at least 3 months continuously and not to interrupt the medication. Also do not engage in strenuous exercise to avoid skin damage, and if symptoms of bleeding occur you should seek medical attention promptly. For 3 months after surgery, it is important to keep warm and cold and go to less crowded places. The most important thing is to review the heart condition regularly.