Mandibular angle plastic surgery adopts special endoscopic direct vision surgery, which can observe the state of the whole mandibular angle without causing damage to facial nerves and blood vessels, and has a high safety factor. The mandibular angle plastic surgery can be completed within 30 minutes, and the incision marks are hidden in the mouth, which fundamentally solves the problem of mandibular angle hypertrophy, with little damage to oral soft tissue, rapid postoperative recovery and no obvious scars.