In　this　paper,　the　following　almost　periodic　n-species　competitive　system　with　feedback　controls)　{(x)　over　dot(i)(t)　=x(i)(t)[b(i)(t)　-　Sigma(j=1)(n)　a(ij)(t)x(j)(t)　-　Sigma(j=1)(n),(jnot　equali)　c(ij)(t)x(i)(t)x(j)(t)　-　d(i)(t)u(i)(t)],　(u)　over　dot(i)(t)=　r(i)　(t)　-　e(i)　(t)u(i)　(t)　+　f(i)　(t)x(i)　(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.　(C)　2004　Elsevier　Inc.　All　rights　reserved.