After right ventricular outflow tract obstruction reconstruction for CHD, surgical pulmonary valve replacement, or transcatheter pulmonary valve replacement may be performed if complicated by moderately severe or severe right ventricular outflow tract dysfunction. However, for patients whose anatomy is not suitable for transcatheter pulmonary valve replacement, surgical pulmonary valve replacement is the only option, but it has a higher rate of perioperative complications and longer hospitalisation for patients. In two cases of severe transcatheter pulmonary valve replacement in which percutaneous pulmonary valve implantation could not be performed directly due to the presence of a large right ventricle, a significant decrease in right ventricular function, and significant widening of the pulmonary arteries, we used a new hybridisation procedure to partially fold and reduce the diameter of the significantly widened pulmonary artery trunk without cardiopulmonary bypass by surgically opening the thorax in a median way, and then successfully implanted a percutaneous self-expanding pulmonary valve valve, with good immediate results in the postoperative period. The postoperative recovery was rapid and the recent results were excellent.