Congenital pulmonary stenosis is a malformation in the development of the pulmonary valve during the development of the heart, usually during the sixth week of embryonic life, when the pregnant mother develops a disease, such as rubella, cold, infection or teratogenic drugs. The clinical symptoms of congenital pulmonary valve stenosis are usually related to the degree of stenosis and age. The common symptoms are palpitations after activity, dyspnea, cyanosis of the lips and mouth, and cyanosis of the skin and face. Severe pulmonary valve stenosis in infancy and early childhood can lead to delayed development and significantly lower growth than that of their peers. Therefore, once clinical symptoms appear, it is important to go to a regular hospital in a timely manner to clearly diagnose the degree and location of pulmonary valve stenosis through cardiac Doppler ultrasound or cardiac catheterization, and choose interventional or surgical treatment according to the test results.