Organic-inorganic hybrid perovskite has been attracted increasing attention in perovskite light-emitting diodes (PeLEDs) and lasers. How to improve the luminous efficiency of perovskite film is a hot topic. Gold nanoparticles (Au NPs) with diameter of 20 nm are doped into PEDOT∶PSS. The emission intensity of CH3NH3PbBr3 film increases 2.7-fold when the CH3NH3PbBr3 film is used as the luminescent layer. The results show that, the absorption of CH3NH3PbBr3 film and the radiation transition rate of excitons are improved when Au NPs are introduced. The results of the analysis combined with optical simulation show that the near-field and far-field surface plasmons of Au NPs can both coupling with absorption and emission areas of perovskite film, and the maximize luminous efficiency can be obtained. The luminous efficiency of perovskite film can be improved at the greatest extent by comprehensive surface plasmons of Au NPs in near field and far field, which can provide important theoretical direction and technical support in the fabrications of high efficiency PeLEDs and lasers.