Objective To discussing the cause and prevention of foreign body in hospital of Otorhinolaryngology.Methods Retrospectively aralyzed the cause and treatment of clinical data of 27 cases foreign body in hospital of Otorhinolaryngology,among which there are 13 csses in nose and nasal sinus,3 cases in cervix,2 in oesophagus,2 in mediastinum,2 in trachea,and 1 case in nose and pharynx antrum.Results Except for one failure of extracting foreign body in mediastinum and one failure of metal body in cervix,other 27 cases are all successful.But there are still 10 disputs between doctors and patients,causing bad influence in hospital.Conclusion To avoid the foreign body in hospital,our medical workers should strengthen our responsibilities,conclude our experience in season,improve our operating skills to prevent such things from happening in our work process.