It is difficult to determine exactly how long brain tumor surgery will take, as it varies depending on the size and location of the tumor, the blood vessels and nerves involved, and the way the craniotomy is performed. Brain tumors mainly include pituitary tumor, glioma, meningioma and so on. 1. Pituitary tumor: Pituitary tumor originates from the adenopituitary gland, and microscopic pituitary tumor resection is often used in transnasal butterfly approach, and the general operation time is about 2~4 hours. If the tumor grows to the saddle and causes nerve compression, the operation time is about 7~8 hours. 2. Glioma: it is an intracranial tumor originated from glial cells, mainly surgical resection of the tumor is the main focus, and the tumor resection can be carried out through the microscope. If the tumor is small, does not invade other parts of the body and has little bleeding, it takes about 3 hours. If the tumor is large or invades the surrounding blood vessels and nerves, the surgery usually lasts about 6~8 hours. 3. Meningioma: belonging to primary intracranial tumors, headache, nausea, etc. can occur, mainly surgical treatment, located in the convex surface of the hemisphere, smaller meningiomas, the operation time is about 1~2 hours, if the tumor is larger or located at the base of the skull, the operation may take about 10 hours. The specific time of brain tumor surgery is closely related to the patient’s own condition, so it is recommended that the patient should seek medical treatment in time and actively treat under the doctor’s guidance.