We　investigate　the　influence　of　particle　plasmon　resonance　of　Au　nanoislands　structures　on　the　exciplex　emission　in　the　polymer　blend　of　poly　(9,9＇-dioctylfluorene-co-benzothiadiazole)　(F8BT)　and　poly　(9,9＇-dioctylfluorene-co-bis-N,N＇-(4-butylphenyl)-bis-N,N＇-phenyl-1,4-phenylenediamine)　(PFB).　The　experimental　results　indicate　that　when　the　particle　plasmon　resonance　of　the　gold　nanoisland　structures　overlaps　the　spectral　range　of　the　exciplex　emission,　significant　enhancement　of　the　photoluminescence　can　be　observed.　Furthermore,　longer　lifetime　has　been　measured　for　the　red-shift　emission　of　the　exciplex.　We　proposed　that　the　localized　field　due　to　the　particle　plasmon　resonance　of　the　Au　nanoislands　has　modulated　the　mechanisms　for　the　formation　of　exciplex,　which　may　be　related　to　the　exciton　diffusion,　charge　transfer,　and　phase　separation　at　the　interface　between　the　two　materials.