the present invention discloses an ablation electrode used in a catheter . the ablation electrode includes an electrode shell , an optional cavity inside the electrode shell and a temperature sensor . an outflow liquid pathway for the perfusion liquid is arranged on the electrode shell , and an inflow liquid pathway for the perfusion liquid is arranged in the proximal end of the electrode shell . a thermal conduction isolation structure is arranged between the temperature sensor and the liquid pathway . the thickness of the electrode shell where the temperature sensor is located is less than 0 . 2 mm . the present invention also provides a perfusion electrode catheter which includes the ablation electrode . the perfused electrode catheter of the present invention can provide efficient prompts on the rising ablation temperature in the ablation process .