In this paper,all approach to generate reusable components from ELF object files is presented．Compared with other software component encapsulation technologies，building reusable software component directly from binary form ELF files is a straightforward process．Symbol tables end relocation information encapsulated in ELF files earl be automatically reprogrammed into a self-contained reusable entity,By augmenting the component with syntactic interface descriptions，mbignity caused by duplicate names in ELF files is eliminated．Binary code scanning is employed to enhance the safety of the component．Further,to prevent unintentional or hostile modifications．the component is signed with an MD5 fingerprint．