The risks of chin retraction orthognathic surgery include anesthesia risk, infection risk, intraoperative damage to nerves, muscles and other risks, in addition to a certain risk of bleeding. Anesthesia risk includes the risk of knowing during the operation, a small number of patients will die of anesthesia allergy, etc.; infection risk, in irregular hospitals and other hospitals for surgical treatment or improper postoperative care, there is a certain chance that the patient will be infected, and the serious cases can also be life-threatening; injury risk includes mandibular bone fracture, asymmetry of the angle of the lower jaw, damage to the mandibular nerve and so on; in addition to this, there is also a risk of bleeding. It is recommended that patients undergoing orthognathic surgery for mandibular retraction should go to a regular hospital to reduce the risk of infection and intraoperative injury to a certain extent.