The successful invasive treatment of tachyarrhythmias is a milestone in the treatment of cardiac arrhythmias and can have effects that are difficult to achieve with drugs for some of them. Its history is more than 40 years old. In 1982, the first case of arrhythmia ablation through cardiac catheter was successfully treated, and after 1990, due to the improvement of method and technology, arrhythmia ablation has been rapidly developed. Catheter ablation therapy has developed rapidly since 1990, and now it is a very mature treatment method in the field of arrhythmia treatment and has basically replaced surgical treatment. According to the different types of energy used in ablation therapy, ablation therapy can be divided into radiofrequency ablation (thermal ablation), cold ablation, ultrasound ablation, laser ablation, microwave ablation, etc., among which radiofrequency ablation is the most widely used. All ablation treatments essentially damage localized lesions within the heart with specific types of energy, so that these lesions can no longer produce or conduct abnormal cardiac excitation. Therefore, ablation is theoretically a “cure” for many tachyarrhythmias. Currently, only catheter radiofrequency ablation is widely used in clinical practice, and catheter cold ablation is also widely used in specific areas. Catheter radiofrequency ablation is performed by generating a high-frequency current through a special instrument, which is conducted to the metal end of the catheter (commonly known as the “tip”) to generate heat, and the contact between the “tip” and the tissue will generate heat to destroy the local tissue. Since the contact area between the “big head” and the tissue is very small, the treatment has little effect on the normal tissue around the lesion. Depending on the size of the local lesion, the physician can use a “large head” of different lengths, ranging from 4 mm to 8 mm. In order to reduce the damage to the surrounding tissues and to treat them more effectively, the technicians invented the cold saline infusion ablation catheter. This ablation catheter generates heat to destroy the local lesion while spraying cold saline around the “big head” to cool down the blood and normal tissue temperature around the “big head”. The “cold saline” is actually saline at room temperature in the catheterization laboratory, although it is room temperature, but still lower than the temperature of our body tissues. The higher temperature can destroy the focal tissue, and the lower temperature can achieve a similar effect. The cold ablation catheter treatment method is to deliver refrigerant to the end of the cold ablation catheter through a specially designed catheter in a sealed state, producing a very low temperature at the end of the cold ablation catheter; the tissue in contact with the end of the catheter forms frozen tissue and the tissue is irreversibly damaged and destroyed. Because of the small contact area between the end of the catheter and the tissue, and because of the advanced design technology, there is no need to worry about damage to normal tissue from the cold ablation method. Because cold ablation does not cause as much tissue damage as radiofrequency ablation and is not as effective in the treatment of some arrhythmias, it is not as widely used as the latter, and the choice needs to be determined by a combination of factors.