OBJECTIVE To find out some risk factors of lower respiratory tract infection in neurology(department) and provide controlling measures.METHODS Totally 883 inpatient cases of neurology(department) in 2005 were retrospectively surveyed and statistically analyzed.RESULTS From them 98 cases were with nosocomial(infection).The infection rate was 11.1%.Among the 98 cases,54 cases were with respiratory tract infection(55%).Lower respiratory tract is the popular part of nosocomial infection in(neurology) department.(CONCLUSIONS) The(treatment) and recovery of the patients are heavily influenced by the infection of lower(respiratory) tract.It is(necessary) to control and prevent main risk factors in order to avoid nosocomial infection.