Botulinum toxin injection into masseter muscle is the most commonly used method for face-lifting, which can make masseter muscle atrophy, shrink cheeks and achieve the effect of face-lifting. At the same time, its effect can last for half a year, but its disadvantage is that it can only make muscles atrophy and has no effect on bones. Face-lifting surgery, that is, mandibular angle resection surgery, is to remove the bone at the mandibular angle, which can also achieve the effect of face-lifting, and the effect is clear, but the patient's pain will be greater; In addition, after puberty, daily diet and chewing will not change the face shape.