Compared with the traditional median incision, the advantages of the axillary incision are more obvious: 1. The incision is short and concealed, aesthetically pleasing, and generally in infants and pediatric patients, the length of the incision is 2.8-125 px. 2. Less bleeding, most pediatric patients can have their chest tubes removed on the first day after surgery, shortening the length of hospital stay, and most patients can avoid blood transfusion. 3.Since the integrity of the patient’s thorax is maintained, it is conducive to postoperative recovery. 4.Since the axillary incision is not fixed by steel wire, no metallic material is left in the patient’s body. 5.For infants and children, it avoids the appearance of a chicken chest after fixation of the sternum by a median incision. The patient was a 7-year-old boy with a ventricular septal defect. The surgical incision was not visible in the frontal view after surgery, and the longitudinal incision of about 5 cm was seen only after raising the arm and turning around. The patient was a 5-year-old girl with a partial atrioventricular canal malformation. The postoperative incision could not be seen in the frontal view, and the longitudinal incision of about 4 cm was seen only after raising the arm and turning around.