In　this　paper,　the　following　almost　periodic　n-species　competitive　system　with　feedback　controls　{ẋi(t)=xi(t)[bi(t)-　∑j=1naij(t)xj(t)-　∑j=1,j≠incij(t)xi　(t)xj(t)-di(t)ui(t)],　u̇i(t)=ri(t)-ei(t)ui　(t)+fi(t)xi(t),i=1,2,...,n,　are　studied　by　using　the　comparison　theorem　and　constructing　suitable　Lyapunov　function,　where　some　important　factors　such　as　the　effect　of　toxic　and　the　age-structure　are　also　considered　simultaneously.　Some　sufficient　conditions　are　obtained　for　the　existence　of　a　unique　almost　periodic　solution　of　above　model.　Examples　show　that　the　obtained　criteria　are　new,　general,　and　easily　verifiable.　©　2004　Elsevier　Inc.　All　rights　reserved.