Cryoablation may be a little brother to the well-developed radiofrequency ablation, but it may be a late comer in the treatment of some arrhythmias, becoming the method of choice for both AV node bypass and Hirschsprung bypass ablation procedures. In recent years, cryoablation has emerged in the field of arrhythmia treatment, taking root in a field where radiofrequency ablation has long ruled, and after several years of development, it has moved from theory to clinical application and has become increasingly sophisticated. In recent years, a large scale clinical trial (frosty) was conducted in foreign countries, and the safety and efficacy data of cryoablation for atrioventricular nodal regressive tachycardia (AVNRT) showed that cryoablation is safer for the ablation of AVNRT, and there was not a single case requiring a pacemaker in the trial, and the efficiency rate was as high as 91%. The safety of cryoablation is self-evident compared to the 1 to 3% incidence of third-degree AV block with radiofrequency ablation. The high safety of cryoablation has become a new hope to break this surgical barrier in the ablation of Hirschsprung’s bundle bypass, where the incidence of AV block is as high as 1/3 with radiofrequency ablation. Cryoablation, as an emerging and promising treatment, will replace RF ablation as the first choice for ablation of the Hitchcock bundle bypass in the near future, and for ablation of the AV node double pathway, it will also have the tendency to replace RF ablation because of its high safety and effectiveness. We believe that in the field of arrhythmia treatment, cryoablation will shine and grow, making a great contribution to the development of the procedure in terms of safety.