In　this　study,　a　metal　nanopillar　array　and　graphene　are　used　to　develop　a　metamaterial　perfect　absorber　(MPA)　with　adjustable　absorption　efficiency,　which　is　analyzed　and　optimized　using　a　finite　difference　time　domain　method.　Simulation　results　show　that　by　tuning　the　chemical　potential　of　graphene,　an　MPA　with　an　absorption　efficiency　tuning　range　of　0.　5　can　he　achieved,　with　the　highest　absorption　efficiency　of　the　MPA　reaching　0.　97.　This　is　because　incident　light　simultaneously　excites　both　surface　plasmon　polaritons　(SPP)　resonance　and　magnetic　polaritons　(MP)　resonance　in　the　MPA.　Analyzing　the　effect　of　the　MPA＇s　structural　parameters　on　its　absorption　characteristics,　the　period　of　the　nanopillars　affects　the　resonance　wavelength　of　SPP,　and　the　thickness　and　radius　of　metal　nanopillars　affect　the　resonance　wavelength　of　the　MP.　Therefore,　the　MPA＇s　absorption　wavelength　can　he　tuned　by　varying　nanopillar　arrays＇　period,　thickness,　and　radius.