Facial muscle spasm and trigeminal neuralgia are mostly caused by pulsatile compression of the nerve by microvessels. Microvascular decompression surgery is a radical method for the etiology of facial muscle spasm and trigeminal neuralgia, in which a 4 cm long incision is made in the scalp behind the patient’s ear, then a small hole of about 2 cm is made in the skull, and the responsible vessels compressing the nerve and brainstem are found after fine separation under microscopic magnification ten times, and a decompression material (polyester sheet or Teffron felt, referred to as cotton pad) is padded between the vessel and the nerve without destroying the nerve and vessel. ) and does not destroy the nerve or vessel. Since the vessels can no longer pulsate and compress the nerve, postoperative myocardial twitching or trigeminal neuralgia can mostly be stopped immediately, and neurological dysfunction rarely occurs. This surgical method removes the cause of the disease from the root, and the surgery is fine and less traumatic. Patients can walk on the ground on the next day of surgery, and can be discharged after 2 to 4 days of observation and treatment without any abnormality. The operation time is generally about 1 hour, and the surgical incision is also small, with an average bleeding volume of only 40 ml. The eradication rate is more than 97%, and it is not easy to recur. The cost of hospitalization is usually around 10,000 yuan. The characteristics of microvascular decompression surgery are mainly reflected in minimally invasive, high safety, remarkable effect and low recurrence rate and less complications, especially it can completely preserve the function of blood vessels and nerves, which becomes the most effective treatment for facial spasm and trigeminal neuralgia, and also the only radical treatment method, which is currently recognized as the most ideal treatment for trigeminal neuralgia and facial spasm in the world.