The survival period of diffuse astrocytoma grade II is about 5~10 years, which is related to the basic state of the patient’s body and whether the treatment is timely. Diffuse astrocytoma grade 2 is a kind of malignant tumor, the harm is greater, the tumor can be rapidly enlarged and can be distant metastasis, etc., which seriously affects the patient’s state of life, limb function, etc., the survival period of most of the patients in about 5~10 years. The survival period is mostly about 5~10 years. The specific survival period is related to the patient’s physical status and whether the treatment is timely. If the patient’s physical state is relatively good, and can be treated in a timely manner, such as surgery, radiation therapy, etc., can improve the prognosis and prolong the survival period to a certain extent. Overall, as a malignant tumor, the overall prognosis of diffuse astrocytoma grade II is not good, and patients are advised to seek timely medical treatment and follow the doctor’s instructions in order to improve the prognosis.