We　study　an　initial　boundary　value　problem　of　2D　nonhomogeneous　magneto-micropolar　equations　with　density-dependent　viscosity　in　smooth　bounded　domains.　When　the　initial　density　can　contain　vacuum　states,　we　prove　that　there　is　a　unique　global　strong　solution　for　the　system　under　the　assumption　that　initial　velocity　is　suitably　small.　In　particular,　the　initial　data　can　be　arbitrarily　large　except　the　gradient　of　velocity.　Finally,　we　obtain　the　exponential　decay　rates　of　strong　solutions　by　using　the　energy　method.　©　2023,　The　Author(s),　under　exclusive　licence　to　Malaysian　Mathematical　Sciences　Society　and　Penerbit　Universiti　Sains　Malaysia.