A　hybrid　membrane　is　employed　as　a　high-order　plasmonic　distributed　feedback　(DFB)　cavity　to　reduce　the　lasing　threshold　of　polymer　lasers.　The　hybrid　membrane　consists　of　an　anodic　aluminum　oxide　(AAO)　membrane,　a　25　nm　thick　silver　layer　and　a　free-standing　polymer　membrane.　The　AAO　membrane　is　fabricated　by　a　low-cost,　single　chemical　etching　method.　Then,　a　layer　of　silver　with　a　thickness　of　25　nm　is　sputtered　on　the　surface　of　the　AAO.　Subsequently,　a　polymer　membrane　is　directly　attached　to　the　silver-plated　AAO　membrane,　forming　an　AAO/silver/polymer　hybrid　membrane.　Under　optical　pumping　conditions,　low-threshold,　three-order　DFB　lasing　is　observed.　The　proposed　laser　device　exhibited　a　dual-threshold　characteristic　because　of　the　evolution　from　amplified　spontaneous　emission　to　DFB　lasing.　And　a　significant　shift　from　omnidirectional　emission　to　directional　emission　lasing　can　be　observed　while　the　pump　energy　density　is　beyond　the　second　threshold.　Furthermore,　the　plasmonic　enhancement　sourced　from　silver　corrugation　reveals　important　improvement　effects　to　the　DFB　lasing　of　AAO/silver/polymer　hybrid　membrane　for　decreasing　threshold,　narrowing　full　width　at　half　maximum　(FWHM),　and　an　increasing　Q　factor.　This　work　may　promote　the　design　and　production　of　low-cost　and　large-area　high-order　plasmonic　DFB　polymer　lasers.　(C)　2022　Optica　Publishing　Group　under　the　terms　of　the　Optica　Open　Access　Publishing　Agreement