The survival time after radiotherapy for brain tumors must be treated on a case-by-case basis. There are various types of brain tumors, such as pituitary tumor, glioma, meningioma, nerve sheath tumor, and so on, and the residual of radiotherapy after surgery is also different, or the benignity and malignancy of the tumor itself is also different. In some tumors that are more sensitive to radiotherapy, it is possible to survive for 5-6 years after radiotherapy. However, in some brain tumors, 1-2 times of radiotherapy does not produce very obvious effect, and it takes 30-40 times of radiotherapy to produce effect, and the survival time may be only 1-2 years. Therefore, the survival time after radiotherapy should be treated according to the specific situation at that time, and not only radiotherapy, but also chemotherapy and surgery should be combined to determine the survival time.