Trigeminal meniscal radiofrequency thermocoagulation is a minimally invasive interventional surgical treatment. It consists of pulsed radiofrequency treatment of the trigeminal meniscus and temperature-controlled coagulation techniques. The procedure uses CT or “C” arm imaging to guide positioning, and intermittent pulsed current sensory stimulation and motor stimulation to test whether the stimulation area matches the patient’s pain area, making the treatment more delicate and safe. Since the unmyelinated fine fibers that conduct nociceptive sensation degenerate at 70° to 75°C, while the coarse fibers that conduct tactile sensation can tolerate higher temperatures, temperature-controlled thermocoagulation is used to control the destruction temperature at 75°C. In this way, the difference in temperature tolerance of different nerve fibers can be exploited to selectively destroy the fine fibers that conduct facial nociceptive sensation in the semilunar ganglion, while preserving the coarse fibers that conduct tactile sensation and are more resistant to heat. The pain relief is immediate and the facial pain is preserved. The aim is to provide immediate pain relief while preserving the sensation of the face. “Radiofrequency thermal coagulation of the semilunar ganglion is suitable for: 1. primary trigeminal neuralgia with unsatisfactory effect of medication; 2. patients with obvious adverse drug reactions to carbamazepine and other analgesics; 3. patients with trigeminal neuralgia who are too old and weak to tolerate craniotomy; 4. patients who are unwilling to undergo craniotomy for trigeminal neurovascular decompression; 5. patients who are unwilling to undergo craniotomy for trigeminal neurovascular decompression. patients with recurrence after trigeminal nerve vascular decompression; 6, patients with recurrence after controlled radiofrequency thermocoagulation treatment, who can undergo coagulation treatment again; 7, patients with unsatisfactory results of gamma knife treatment and pain not eliminated or reduced; 8, patients with trigeminal neuralgia caused by tumor and pain not improved by gamma knife or surgical treatment. “Compared with other treatments, radiofrequency thermal coagulation of hemianopia is safer and more effective. The operation takes 30-60 minutes, and the pain is relieved immediately during the operation. The patient receives the temperature-controlled treatment plan in the awake state, and the effect is immediate. It also has a low recurrence rate and low cost, and is gladly accepted by the majority of patients. The use of CT and “C” arm image guidance ensures accurate puncture of the foramen ovale and trigeminal nerve hemimelia, significantly improving the treatment effect. After the puncture is in place, the trigeminal meniscus can be stimulated with a weak current to verify that the proposed target area matches the patient’s painful area, making the treatment more precise and safe. Temperature-controlled thermocoagulation is to gradually increase the temperature in the target area of destruction, taking advantage of the different heat tolerance of nociceptive and tactile nerve fibers to selectively destroy the nociceptive nerve fibers, and the treatment process is accurately adjustable, avoiding the blindness of anhydrous alcohol or glycerin injection and eliminating the paid injury of injecting irritating drugs. The pain elimination efficiency of radiofrequency thermocoagulation is more than 95%, and the 2-year recurrence rate is only 20%. The efficacy is consistent with the open microvascular decompression surgery method, and the risks of general anesthesia, pain and trauma of surgery, and fatal and disabling craniotomy are avoided.