The cure rate of radiotherapy has a great relationship with the type of tumor and the severity of the disease. The earlier the disease is diagnosed and treated, the higher the cure rate of radiotherapy is, which generally can reach 55%, and the specific situation varies from person to person. Radiotherapy mainly involves applying rays to tumor cells to inhibit their growth or destroy them directly. Most malignant diseases can be improved by radiation therapy, such as brain tumors and small cell lung cancer. If the diagnosis is made in the early stage of the disease and the pathology is sensitive to radiotherapy, the cure rate is relatively higher, for example, the cure rate of nasopharyngeal cancer, prostate cancer and early lung cancer is about 55%; even the cure rate of early cervical cancer patients can reach more than 90%. However, the actual cure rate may vary depending on the specific conditions. It is recommended that patients should seek medical treatment in time and choose the appropriate treatment plan after systematic evaluation.