Thesis topic: the airway to different wet process, the effect of the patients with trachea comparison Pick to Objective: to compare the discontinuous endotracheal dropping, aerosol inhalation of injection pump control, wet moist method for airway in the clinical effect. Method: choose the trachea 60 cases were randomly divided into three groups of patients are intermittent endotracheal dropping, aerosol inhalation of injection pump control wet, continue to moist in the airway. Statistical analysis the clinical effect of three groups. Results: injection pump control continued in the airway wet, happen irritating cough, airway mucosal bleeding, and pulmonary infection rate is better than the other two kinds of methods. Conclusion: injection pump control continuous airway moist can significantly reduce irritating cough, airway mucosa and pulmonary hemorrhage of infection.