According to the size of the ventricular septal defect to decide whether to treat or not, the details are as follows: 1, the size of the ventricular defect is below 1/3 of the aortic diameter, good growth and development, can review ultrasound in 3-6 months; 2, the size of the ventricular defect is between 1/3-2/3 of the aortic diameter, generally need surgery; if it is a newborn, can review the heart ultrasound in three months and then decide; 3, the size of the ventricular defect is above 2/3 of the aortic diameter, need early surgery, the age of surgery according to the local medical technology conditions.