Abstract: 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.