Whether radiotherapy is necessary for squamous lung cancer needs to be judged according to the stage of the patient’s disease, and the treatment plan should be chosen under the guidance of professional doctors. Squamous cell carcinoma is a type of non-small cell lung cancer, and the specific cause is still unclear. The treatment of squamous cell carcinoma is related to the patient’s condition. Early and middle stage squamous cell carcinoma is mainly treated by surgery, and at the same time, it should be supplemented by chemotherapy, radiotherapy and targeted therapy according to the postoperative condition. In advanced stage squamous cell carcinoma, chemotherapy is the main treatment, supplemented by radiotherapy, targeted therapy and immunotherapy. Radiotherapy is known as radiation therapy. Radiotherapy for squamous cell carcinoma is mainly categorized into radical radiotherapy, palliative radiotherapy and adjuvant radiotherapy, etc. Since squamous cell carcinoma is more sensitive to radiation, radiotherapy is also one of the important adjuvant treatments in clinic. Radical radiotherapy is suitable for patients whose cancer cells have not spread and whose tumors are limited, but who are inconvenient or unable to tolerate surgical treatment, and it can replace surgical treatment. Palliative radiotherapy can inhibit the development of tumor cells, delay the spread of cancer cells, and at the same time, relieve the clinical symptoms of patients. To sum up, whether radiotherapy is necessary for squamous cell carcinoma needs to be decided according to the specific situation, and it is suggested that patients should consult doctors in time and choose whether radiotherapy is necessary under the guidance of professional doctors.