Based on the upper echelons theory, taking China's A-share manufacturing listed companies from 2015 to 2020 as a research sample, the impact of female executives on corporate innovation investment is empirically tested, and the mediating role of organizational redundancy is explored . The study found that: female executives help to promote organizational redundancy; both female executives and organizational redundancy can significantly promote innovation investment; organizational redundancy plays a partial mediating role between female executives and innovation investment. The conclusions not only enrich the theory of organizational redundancy, but also provide a path for the innovation effect of female executives.