The ductus arteriosus is a common congenital heart disease. The ductus arteriosus is a normal channel between the pulmonary artery and the aorta during fetal life and an important pathway for fetal circulation. If it remains open and a left-to-right shunt is present, the ductus arteriosus is not closed. The treatment of unclosed ductus arteriosus is as follows: For unclosed ductus arteriosus, if the ductus is not too thick, it may have the possibility of self-healing, and if the child has no symptoms at present, the child can be followed up regularly to see if the ductus can close on its own. Surgical ligation or cutting and suturing of the catheter can cure the problem, and it is advisable to perform it before school age, and if necessary, surgery can be performed at any age. In preterm infants with preterm ductus arteriosus, oral medication or surgical ligation of the catheter can be chosen depending on the situation. In recent years, interventional treatment has become the preferred method for patent ductus arteriosus, which can be performed with a miniature spring coil or mushroom umbrella to block the arterial catheter, and can be performed under direct electronic screen vision with precision and minimal invasiveness. With the improvement of medical level, with the development of examination and imaging technology and catheter interventional technology, the treatment of unclosed arterial duct can make most children get a complete cure, and the trauma of surgery is also very small.