Abstract: For the three cases listed in this article,difficult airway was anticipated preoperatively.We described how we intubated,but it did not mean what we did was the best choice.For the first case of ankylosing spondylitis,comprehensive airway evaluation was performed the day before surgery including the possibility of mask ventilation.We all considered easy mask ventilation after discussion at morning round.There were no anomalies of his orofacial development,and the patient did not snore at night.In patients with easy mask ventilation,awake intubation is not always the first choice.