The　performance　of　distributed　feedback　(DFB)　polymer　lasers　was　adjusted　by　changing　the　cavity　coupling.　The　microcavity　of　DFB　polymer　lasers　was　fabricated　by　two-beam　multi-exposure　interference　lithography.　With　the　different　angles　between　two　gratings,　the　coupling　strength　of　the　cavity　modes　was　controlled.　Reducing　the　coupling　strength　of　cavity　modes,　the　threshold　of　the　polymer　lasers　decreased.　According　to　the　experimental　results,　the　azimuthally　polarized　output　was　changed　by　tuning　the　cavity　coupling.　This　method　provides　a　facile　way　to　realize　low　threshold　and　azimuthally　polarized　DFB　polymer　laser.