Generally speaking, bone grinding surgery is a major operation in plastic surgery, which is generally used for deformity of mandibular angle, chin and cheekbone, or to make facial contour more beautiful. Clinically, it is often used to grind the bone of mandibular angle hypertrophy, chin protrusion and zygomatic protrusion, so as to make the facial contour more refined and stylish. Clinically, it is necessary to clearly inform patients of the risk of surgery before operation. The operation should be carried out under general anesthesia, and complications such as bleeding and hematoma may occur after operation. If large blood vessels are damaged, hemorrhagic shock may occur. Grinding facial bones may cause facial nerve branch injury, leading to facial paralysis. Surgery must go to a regular medical institution and be operated by a regular doctor, so as to achieve better bone grinding effect.