Disclosed is a radiofrequency ablation catheter, comprising an electrode ablation head (10), a PTC thermal resistor body (20) and an inner conductor (30). The electrode ablation head (10) is arranged at the end of the inner conductor (30). The PTC thermal resistor body (20) is provided between the electrode ablation head (10) and the inner conductor (30). The inner conductor (30) is connected to a cable plug assembly (40). The radiofrequency ablation catheter and a treatment device containing the radiofrequency ablation catheter can exactly control the ablative temperature by means of the PTC thermal resistor body (20), and achieve non-adhesion of the ablation catheter, thus having no complications of recurrent bleeding and other risks when coagulating tissue.
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