Gamma Knife therapy refers to the irradiation of diseased or normal tissues with gamma rays generated by cobalt-60 to produce focal necrosis or functional changes for the purpose of treating disease. Gamma Knife is the main therapeutic tool of stereotactic radiosurgery, a radiological technique that utilizes high-energy gamma rays generated by cobalt-60, which are collimated by a collimation system to focus a single high-energy shot on a target or focal area to produce a destructive or desired biological effect. Gamma Knife treatment produces almost no radioactive damage to the surrounding non-diseased tissues, similar to the excision of the lesion, the treatment is simple, convenient and safe, and there is no contraindication to surgery, no need for anesthesia. Gamma Knife therapy can treat benign intracranial tumors, malignant tumors, cavernous hemangioma, trigeminal neuralgia and other diseases.