Mandibular angle plastic surgery includes Korean-style long curved mandibular angle osteotomy, mandibular angle reduction and cheekbone reduction, mandibular angle reduction and square mandibular angle reduction, mandibular angle plastic surgery, using mandibular bone to pad the chin, and protruding chin. For mandibular angle plastic surgery methods such as maxillary protrusion correction and maxillomandibular protrusion correction, plastic surgery hospital experts introduced that long-curved mandibular angle osteotomy uses a special endoscope to first design the surgical osteotomy line and then directly see the outline of the bone. This is a one-time osteotomy surgery formed by a long curve starting from the top of the angled mandibular angle and moving forward to the position below the vertical line of the corner of the mouth.