The study was designed to investigate the relationships demographicvariables(age and gender)and death anxiety,and to examine the mediating functionof death anxiety attributional style on death anxiety. 544 middle-and-senile aged subjects and 459 college student subjectsparticipated in this study. The results showed that college student subjectsmanifested significantly higher death anxiety than the middle-and-senile agedsubjects, female subjects'death anxiety was higher than the male, and an interaction effect revealed that there was no significant gender differencein college student, while a significant gender difference in the middle-and-senile was noted. The results supported that age and gender maybe the moderatingvariables which influence the relationship between demographic variable and death anxiety. As regard to the death anxiety attributional style, 10 attributional styleswere found, including external-global-unstable, external-global-uncontrollable,external-global-imp[ortant, external-unstable-uncontrollable, external-unstable-important, external-uncontrollable-important, global-unstable-uncontrollable,global-unstable-important, global-uncontrollable-important, unstable-uncontrollable-important, and the 10 death anxiety attributional styles were notfully compatible with the depressive attributional styles proposed by Abramsonet al. In addition, the mediating role of death anxiety attributional styles which was played between demographic variables and death anxiety has also beensupported. Elucidations of results and further study has also been discused in thisarticle.