In fact, the treatment of traumatic facial palsy is not difficult for doctors who master microsurgery techniques and oral and maxillofacial surgery specialties, but the key is to master the timing of nerve repair. If the damage of facial nerve can be found when the trauma is cleared and sutured in the first hospital, it is possible to repair it immediately with a simple nerve anastomosis, and the facial palsy will recover faster. If the first hospital does not have the condition and technology for nerve repair, the patient should be told to hurry to find a hospital with the condition to operate as soon as possible. If there is a lost opportunity to repair the nerve in phase I surgery, it can still be made up by postponing the surgery. Postponed surgery usually requires a nerve graft because the severed nerve is buried in the scar and unhealthy nerve tissue must also be removed, which inevitably results in a defect between the severed ends of the nerve. Studies have proven that barely pulling together the connected nerve severed ends results in a worse repair than doing a nerve graft. Tension-free connections and accurate alignment of sutures between nerve dissections are the two main elements of nerve repair. Studies have also demonstrated that it generally takes 3-4 months from the time of facial nerve repair to the recovery of facial movement, due to the fact that nerve regeneration always grows from the central side to the peripheral side, unlike skin wounds, which can be actively repaired on both sides. Assuming a rate of facial nerve regeneration of 1.5 mm per day, the distance the nerve grows from the severed end to the muscle and the time to bring the muscle back to innervation can be calculated. According to this principle, a simple nerve anastomosis or nerve graft must be completed within 8 months after the nerve break. Beyond this time, severe muscle atrophy will occur, and even if the nerve grows to the muscle, there is very little hope for functional recovery. It is like a broken motor, it is useless to connect a wire! Peripheral nerves are like biological cables, and it is worthwhile to cut the less important sensory nerves to repair the important motor nerves! The temporary loss of sensation can be gradually compensated by the regeneration of other sensory nerves. If the nerve is damaged for more than 1 year and the function is not restored, a combined neuromuscular graft must be performed, which is much more complicated than nerve anastomosis and nerve grafting.