Advanced stage of lung cancer brings panic to many patients, as if they are going to be close to death soon, but in fact, advanced stage of lung cancer can be treated effectively if treated actively. How to treat advanced lung cancer? Experts point out that radiotherapy is one of the main treatment methods for advanced lung cancer, and there are multiple treatment methods. In clinical treatment of lung cancer, through the use of new equipment such as gas pedal, intensity modulated conformal and new modern radiotherapy techniques such as stereotactic radiotherapy and three-dimensional conformal radiotherapy, high-energy radiation is directly focused on the patient’s tumor to achieve the ultimate goal of eliminating tumor and reducing damage, so that the treatment effect of lung cancer can reach the best. The 5-year survival rate of modern radiotherapy for early-stage lung cancer treatment is almost close to the effect of surgery, while its side effects and complications are also less. In this way, the treatment effect is very good even in advanced stage of lung cancer. What do you think about whether lung cancer can be treated in advanced stage? Using modern radiotherapy to treat lung cancer can effectively increase the local irradiation dose to the tumor target area and reduce the radiation damage to the normal tissues around the tumor, thus increasing the local control rate of tumor and improving the quality of life of patients during and after treatment. We also need to know that modern radiotherapy for lung cancer is less restricted by blood vessels, because blood vessels have higher tolerance to radiation, and it is safer to use radiotherapy when tumor infiltrates blood vessels and surgery is difficult; there is no site restriction, radiation is invisible, and radiotherapy can be used in any site; it is non-invasive and has little impact on the whole body, and most patients with poor physical condition can tolerate radiotherapy, which is suitable for many advanced lung cancer patients. I hope that patients with advanced lung cancer will not be discouraged and keep an optimistic attitude to actively cooperate with lung cancer treatment for the best treatment effect.