The　weak　magneto-optical　(MO)　signal　of　traditional　MO　materials　is　indeed　an　important　issue　for　their　further　practical　applications.　Although　many　strategies　have　been　proposed　to　improve　the　MO　effect,　hybridization　with　noble　metal　nanostructures　is　a　promising　route　in　recent　years　due　to　the　high　localized-surface　plasmon　resonances　(LSPR)　effect.　A　new　magneto-optical　surface　plasmon　resonance　(MOSPR)　structure　hybrid　with　Au　bowtie　arrays　is　proposed　to　increase　the　measuring　range　of　the　polar　magneto-optical　Kerr　effect　(PMOKE)　and　the　quality　factor　through　the　LSPR　effect.　It　is　verified　by　a　numerical　simulation　of　the　finite　element　method　(FEM).　The　optimized　parameters　were　found　by　modulating　the　shape　and　geometric　dimensions.　Owing　to　the　significant　LSPR　from　the　Au　bowties,　a　PMOKE　amplification　signal　spectrum　with　narrow　linewidth,　and　a　high　amplitude　with　high-sensing　performance　was　achieved.　Compared　with　the　bare　magnetic　film　alone,　by　optimizing　the　relevant　parameters　of　the　LSPR　structure,　the　maximum　signal　increases　3255　times,　and　the　quality　factor　can　be　greatly　improved,　which　would　provide　important　guidance　and　help　for　the　practical　application　of　MO　devices.