The right lateral incision is aesthetically pleasing and less invasive, but not all precordial diseases are suitable for a lateral incision. Cardiac surgery is still safety first, and having an aesthetic incision while ensuring safety is good for the child’s future growth. Especially for the psychological, he will not produce a psychological inferiority complex.6 In the end, which precardiac diseases are suitable for the side incision: 1, not combined with pulmonary hypertension, mainly atrial septal defect and ventricular septal defect 2, the location of the septal defect is appropriate, while not too large, if reluctantly done, the possibility of residual shunt will increase 3, part of the pulmonary vein translocation drainage, the preoperative diagnosis must be clear, only 4, partial endocardial cushion defect, such patients should have good valve condition, preferably not to have moderate closure insufficiency before surgery 5, the most suitable age for lateral incision is 1 to 3 years old, too small because the child’s side of the lung compensation ability is not strong, the respiratory status may be unstable after surgery; too large because the child’s weight is large, the heart is too far from the In conclusion, an aesthetically pleasing incision is beneficial to the child’s growth and development and self-confidence, while ensuring safety. I operated on a patient with a ventricular septal defect who had a lateral incision 2 months ago and recovered well. I am sure that his future will be full of sunshine.