further lead to tumor necrosis. The normal lung tissues around the lung tumor can dissipate heat through the blood circulation and exhalation of the large blood vessels in the lung, so the normal lung tissues actually play the role of insulation, so that the energy can be fully concentrated in the lesion site; coupled with the low blood flow in the lung tumor tissues, radiofrequency ablation is feasible and effective in treating lung tumors. The main indications include: ① patients with peripheral non-small cell lung cancer that cannot be resected by surgery; ② patients with peripheral lung cancer who cannot tolerate surgery due to poor cardiopulmonary function or are too old to undergo surgery; ③ tumors that are more than 1.0 cm away from large blood vessels or large bronchi; ④ patients with inoperable small cell lung cancer whose tumors have progressed or recurred after radiotherapy; ⑤ patients who resolutely refuse surgery; ⑥ multiple metastases in the lung.