The child had recurrent tachycardia for more than 9 months and was diagnosed with “ventricular tachycardia” by an outside hospital. After radiofrequency ablation, the child was given oral amiodarone, betalactam and other antiarrhythmic drugs, but the ventricular tachycardia still recurred. Two months ago, the tachycardia recurred and the child was rushed to the hospital with sudden loss of consciousness and cardiac arrest on the way. After admission, cardiopulmonary resuscitation, tracheal intubation and electric defibrillation were performed, and the child was successfully resuscitated after 23 minutes. After the child’s condition was stabilized. He came to our hospital for further treatment and was proposed to undergo radiofrequency ablation. The admission electrocardiogram showed persistent polymorphic ventricular tachycardia. The patient’s right and left iliac veins were occluded, the right femoral artery was punctured, and the 5F arterial sheath SNP yellow ablation catheter was inserted, and the tachycardia was terminated by temperature-controlled mode of 50-70°C/20-35w discharge in the area innervated by the left posterior and left anterior branches, respectively, as measured by the marker, with enhanced discharge to 320s and ventricular scan, which could not induce tachycardia. The radiofrequency ablation was successful and the child had no adverse intraoperative effects. The child was returned to the ward. After the successful RF ablation, the child’s vision was slowly restored and now he can say “mommy and daddy”. We sighed with admiration at the skill of Director Yang and the tenacity of the child’s life.