The invention discloses a configurable security file object reusing method. The configurable security file object reusing method comprises the following steps: (1), constructing a security file erasing rule base; (2), monitoring file operation in a Linux kernel layer, invoking decision logic to judge whether security file erasing is needed or not, and collecting corresponding file information; and (3), in need of performing security file erasing, executing security file erasing operation in combination with the file information according to the security file erasing rule base. Compared with the prior art, the configurable security file object reusing method disclosed by the invention is high in universality, good in compatibility and high in flexibility, and is applied to occasions having different security protection grades.