The application of radiofrequency ablation under thoracoscopy for the treatment of lung tumors that have lost the chance of surgical treatment has the following features: ① For advanced cases that have not been diagnosed preoperatively and have no chance of surgical resection, the pathological diagnosis can be obtained through thoracoscopy and radiofrequency treatment can be performed at the same time; ② Cases that have lost the chance of further surgical treatment (such as pathologically confirmed pleural implantation) are found through thoracoscopic exploration to provide a new treatment method. ③The treatment process is intuitive and precise in positioning, which can avoid the effects of respiratory motion and puncture needle artifacts that often exist during CT-guided treatment, and the treatment effect is good; ④Reduces some common complications of percutaneous percutaneous radiofrequency ablation treatment; ⑤The treatment process is performed under general anesthesia, which can avoid the patient’s position, poor cooperation, and sensation during percutaneous percutaneous treatment. ⑤ The treatment process is carried out under general anesthesia, which can avoid the discomfort of patient’s body position, poor cooperation, feeling fever and chest pain during percutaneous puncture. However, it must be emphasized that lung cancer is a systemic disease, and RFA is only one of the local treatment means, which has its own specific application scope, and should be combined with surgery, radiotherapy, chemotherapy and biotherapy for the multidisciplinary comprehensive treatment of lung cancer. Such as poor lung function, etc.) treated with radiofrequency under thoracoscopy.