Ｏｂｊｅｃｔｉｖｅ　To evaluate the features and management methods of anesthesia for infants with rapid arrhythmia undergoing radiofrequency catheter ablation.　Methods　One hundred and twenty-three infants with rapid arrhythmia undergoing radiofrequency catheter ablation were retrospectively analyzed in this study. All infants were given combined anesthesia while using laryngeal mask to manage airway. Record the success rate of operation, anesthesia time, operation time and related complications.　Results　Of the included 123 cases, the operation of 109 cases were finished with successful rate of 95.4%(104/109). The mean operation and anesthesia time were (86.38±33.52) min and (92.28±37.19) min respectively. The operation of 6 cases were not performed due to unsuccessful induction of tachycardia. There are 5 cases of postoperation agitation, 4 cases of laryngeal spasm were disappeared after deepen anesthesia. 1 case of larygeal spasm was discharged to patient unit. The laryngeal spasm was disappeared until intubation for 3 h. There are total 3 cases of postoperation nausea and vomiting.　Conclusions　Radiofrequency catheter ablation of infants and young children with rapid arrhythmia had high risk and high incidence of anesthesia related complications. Good management of hemodynamics and airway, reasonable selection of narcotic are the key management of this kind of anesthesia.