1. Clarify whether it is really a glioma: Although a clear diagnosis of glioma can be made based on cranial CT, MRI and PET-CT, only pathological diagnosis is the gold standard, which is the objective basis for the development of subsequent radiotherapy regimens. The latest pathological classification of glioma takes into account both histological and molecular features such as (glioblastoma, IDH wild type). Therefore, according to the actual conditions, molecular tests should also be performed on the surgical specimens to determine the prognosis and select a sensitive follow-up plan.2. Reduce intracranial pressure and relieve neurological signs and symptoms: Since the current routine physical examination does not include cranial examination, intracranial gliomas are often treated with radiotherapy because of their prognosis. Therefore, intracranial glioma is often detected only because it produces symptoms and goes for examination. Since the tumor is already relatively large by this time, the occupying effect is obvious leading to cranial hypertension causing headache, dizziness, and even decreased level of consciousness. Or even if the lesion is small, it is close to an important functional area, causing early neurological localization signs (speech, motor, sensory, visual and other neurological deficits). Or the lesion may be detected because of its proximity to the cerebral cortex causing epilepsy. Surgical removal of the lesion relieves the occupying effect and reduces intracranial pressure; relieves the lesion of compression and continued destruction of peripheral neural structures and relieves neurolocalization signs and symptoms. It buys time for the implementation of subsequent adjuvant therapy.3. Minimize tumor load under the premise of safety, improve the effect of radiotherapy and prolong survival: At present, surgical resection is still the treatment of choice for glioma. The maximum removal of tumor and the minimum medical source of neurological damage is the purpose of surgery. Postoperative radiotherapy is more likely to kill all residual tumor cells. Studies have shown that even if a glioma is not fully resected, if the extent of resection is 90% or more, it makes a significant contribution to prolonging the survival of the patient. Even resection of 70% or more is very helpful in prolonging survival.