Symptoms of brain tumor patient’s death are mainly caused by intracranial occupation caused by brain tumor, which leads to increased intracranial pressure. Therefore, the symptoms are mainly caused by increased intracranial pressure, which can be manifested as coma, limb paralysis, central hyperthermia, urolithiasis, and so on, and there are also possibilities of gastrointestinal hemorrhage, lung infection, urinary tract infection, deep vein thrombosis of the lower limbs, and other complications. On physical examination, one can see unequal pupils on both sides or dilated pupils on one side or dilated pupils on both sides, weakened or disappeared physiological reflexes, and positive or disappeared pathological reflexes. For patients with brain tumor, surgery is the main treatment in the early stage, and if there is no indication for surgery, radiotherapy and chemotherapy can be considered.