Radiofrequency ablation (RFA) is the application of ablation electrodes, percutaneous puncture under the guidance of ultrasound, CT, or during surgery or under thoracoscopy, so that the radiofrequency electrode enters the solid tumor tissue, and then 9 anchor-shaped thin electrode wires are extended at the front of the ablation electrode needle and inserted into the tumor tissue, through the radiofrequency output, so that the tissue cells in the lesion area ion The local temperature reaches more than 90℃, through the heated temperature to kill the tumor tissues lesion tissues undergo coagulative necrosis and finally form liquefied foci or fibrotic tissues, while the real-time adjustment of monitoring temperature so as to achieve the purpose of local elimination of tumor tissues, and finally the puncture needle tract is heated and ablated to prevent tumor implantation. Radiofrequency ablation lung cancer treatment includes five operational procedures: needle entry, positioning, heating, ablation and needle tract ablation. Percutaneous radiofrequency ablation is a new technology developed in recent years for the treatment of lung cancer, together with radiotherapy and chemotherapy. This method has the advantages of less trauma, quick recovery, simple operation, less side effects and can treat multiple tumors at the same time. Radiofrequency ablation technology opens a new window for the treatment of lung cancer, which is applicable to patients with early-stage lung cancer or lung metastases that cannot tolerate surgery, and can also be used as a remedial treatment measure for open-chest surgical exploration of lung cancer and tumor reduction treatment for patients with locally advanced and metastatic lung cancer, providing conditions for comprehensive treatment. Through CT-guided three-dimensional reconstruction, the radiofrequency ablation treatment electrodes can be evenly distributed in the lung tumor to maximize the completion of radiofrequency ablation treatment. This is an unparalleled advantage of open-heart surgery or thoracoscopic radiofrequency ablation treatment, and is the preferred radiofrequency ablation treatment in the field of thoracic surgery and lung cancer treatment worldwide, which can both ablate tumors to the maximum and achieve minimally invasive treatment to the maximum. As a new method of lung tumor treatment that is easy to operate, minimally invasive and safe, radiofrequency ablation is especially suitable for the local treatment of peripheral type primary lung cancer and metastatic cancer that cannot undergo surgical resection for various reasons. Since 2009, our department has carried out CT-guided percutaneous lung aspiration biopsy and radiofrequency ablation of lung tumors, and the technology has been fully matured, which has brought good news to many patients who lost the chance of surgery.