Transluminal balloon valvuloplasty was used to treat congenital pulmonary valve stenosis is 12 patients and aortic valve stenosis in 3 patients aged 22 months to 18 years. the right ventricular pressure gradient decreased from 87.8$pm$30.33mmHg to 33.3$pm$ 16.99mmHg(P<0.01) immediately after the procedure for pulmonary valve stenosis. The procedure success rate was 92% (11/12) and the case which failed was one due to mild dysplatic pulmonary valve. The pressure gradient across the aortic valve before percutaneous balloon aortic valvuloplas-ty were 220 , 103, 119mmHg decreased to 64, 69, 96mmHg after the procedure. Percutaneous transluminal balloon valvuloplasty was effective in the treatment of congenital pulmonary and aortic valve stenosis.