Meningioma is one of the most common intracranial tumors in adults, second only to glioma in incidence. Most are benign, slow-growing, and clearly delineated from brain tissue, with only a very small percentage (about 1.7%) growing malignantly. Meningiomas are associated with the arachnoid membrane and can occur anywhere there are arachnoid cells, especially in areas with arachnoid granules. Common sites include: parsagittal sinus, cerebral convexity, pars falciformis, saddle nodes, pterygoid crest, olfactory groove and lateral ventricles. The occurrence of meningioma may be related to certain internal environmental changes and genetic variants. It is not caused by a single factor, but may be associated with cranial trauma, radiation exposure, viral infection, etc. Meningiomas are spherical in shape and have clear borders with brain tissue. The tumors are dense gray or dark red tissue, and sometimes contain sand granules within the tumor. Intratumoral necrosis is often seen in malignant meningiomas. Meningiomas can sometimes thicken or thin the adjacent skull by invasion. Tumors can range in size from 1 cm to more than 10 cm in diameter. The tumor is mostly spherical, conical, flat, or dumbbell-shaped. The following types of meningiomas are common: 1) endothelial, 2) fibrous, 3) vascular, 4) gritty, 5) mixed or metastatic, 6) malignant meningioma, and 7) meningeal sarcoma. Meningiomas are slow-growing process tumors that present with early symptoms for an average of 2.5 years, and up to 6 years in a few patients. Patients often present with headaches and seizures as the first symptoms. Depending on the location of the tumor, visual field, olfactory or auditory disturbances and limb movement disorders may also occur. For the examination of meningioma, CT and MRI are mainly used. The treatment of meningioma is mainly surgical resection. In principle, complete resection and removal of the meninges and bone invaded by the tumor should be strived for, with a view to radical cure. In some advanced tumors, especially deep meningiomas, the tumor is huge and adheres too tightly to nerves, blood vessels and brainstem, so only partial resection can be done. Malignant cases can be supplemented with radiotherapy.