The ultrasound ablation system replaces traditional radiofrequency ablation treatment with interventional ultrasound energy focusing. It uses an electrode catheter with an ultrasound transducer to be inserted into a specific part of the heart cavity through a vein or arterial blood vessel, releasing ultrasound energy to cause the internal tissue of the endocardium at the designated location to lose its vital characteristics, achieving the function of blocking the abnormal conduction beam and origin point of rapid arrhythmia, and thus completing the ablation treatment surgery more safely and accurately.