In　this　paper,　we　consider　a　Volterra　model　with　mutual　interference　and　Beddington-DeAngelis　functional　response.　By　applying　the　comparison　theorem　of　the　differential　equation　and　constructing　a　suitable　Lyapunov　functional,　sufficient　conditions　which　guarantee　the　permanence　and　existence　of　a　unique　globally　attractive　positive　almost　periodic　solution　of　the　system　are　obtained.　(C)　2009　Elsevier　Inc.　All　rights　reserved.