The invention discloses a regulating system of an arrhythmia radio frequency catheter. The regulating system comprises a signal acquisition module, a signal processing module, an amplifier module, a display module, a power selection module and an ablation electrode, wherein the signal acquisition module is used for acquiring an impedance signal of a heart, the impedance signal is amplified by virtue of the amplifier module and is transmitted to the signal processing module, the signal processing module is used for processing and calculating the signal so as to obtain impedance information, and the power selection module is used for selecting working power of the ablation electrode according to a processing result of the signal processing module; and the display module is used for displaying a heart impedance result and the working power of the ablation electrode, and the ablation electrode is used for carrying out ablation treatment on a heart region. The regulating system disclosed by the invention can detect impedance of a focus region in real time, judge an impedance value and carry out ablation on the focus region, so that the aim of continuous ablation of the radio frequency catheter is achieved, and a treatment effect is improved.