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Emergency UE laryngoscope was performed to expose the glottis, and the patient had difficulty opening his mouth. After 3min, the blood oxygen saturation was not maintained well, which decreased from 87% to 60%. The patient has wheezing in the airway, oxygen is given to the mask, and the patient cannot open his mouth when trying to breathe sputum. After the patient's consciousness was restored, the patient could shake hands, and the tidal volume of spontaneous breathing reached 8ml/kg, the tracheal catheter was pulled out. Supine position was restored after the operation and sputum aspiration was observed. The operation time was 2 hours and 27 minutes. Cervical occipital fixation (C3 and occipital protuberance fixation) was performed in prone position. 7.5 strengthened tracheal catheter was inserted through the mouth. Induction of intravenous general anesthesia, loss of consciousness and muscle relaxation were followed by UE visual laryngoscope, combined with visible glottis exposure, and the No. Preoperative diagnosis: atlantocone comminuted fracture, atlantoaxial joint subluxation, brain contusion and laceration, right frontal and temporal bone fractures, right zygomatic arch fractures, calf intermuscular vein thrombosis. Occipitocervical fusion, cervical spine, joint dislocation Cases The o-c2 Angle is an independent medical factor that determines postoperative dyspnea and dysphagia, which should be mainly considered. Factors such as difficulty in intubation, degree of vertebral fusion, and operation time should be considered. The purpose of this study was to review the airway management of the latter patient, determine the incidence, nature and risk factors of postoperative airway adverse events, and determine the relationship between airway adverse events and changes in dOC2A. Changes in the occipital neck fusion Angle after surgery may lead to acute airway obstruction, dyspnea and/or dysphagia. Airway management may be challenging in patients undergoing OCF. However, there are serious complications after occipitocervica fusion, which may even threaten the life of the patient. Occipitocervical fusion is a common surgical method to treat cervical spine instability caused by atlantoaxial joint dislocation, upper cervical spine injury and degenerative disease of upper cervical spine.