Radiotherapy for tumor is generally effective for lung cancer, but it should be handled in accordance with doctor’s prescription. Generally radiotherapy for lung cancer patients includes radical radiotherapy and palliative radiotherapy. Different pathological types of lung cancer have different sensitivity to radiotherapy, generally small cell lung cancer is the most sensitive to radiotherapy, followed by squamous cell carcinoma, adenocarcinoma and alveolar cell carcinoma have poorer sensitivity in general. Radiotherapy for lung cancer patients can not only be used to treat the primary lesion of lung, but also can be used to treat the metastatic lesions of lung cancer, such as local radiotherapy for bone metastasis, whole brain radiotherapy for brain metastasis, etc. On the one hand, radiotherapy can control lung cancer, and on the other hand, it can help to control lung cancer. Radiotherapy for lung cancer can control the development and spread of cancer cells, and at the same time, it can kill the cancer cells so that the cancer foci can be reduced in size, thus alleviating the symptoms.