This　paper　focuses　on　the　long　time　behavior　of　the　solutions　to　the　Cauchy　problem　of　the　three-dimensional　compressible　magneto-micropolar　fluids.　More　precisely,　we　aim　to　establish　the　optimal　rates　of　temporal　decay　for　the　highest-order　spatial　derivatives　of　the　global　strong　solutions　by　the　method　of　decomposing　frequency.　Our　result　can　be　regarded　as　the　further　investigation　of　the　one　in　(Wei,　Guo　and　Li　in　J.　Differ.　Equ.　263:2457–2480,　2017),　in　which　the　authors　only　provided　the　optimal　rates　of　temporal　decay　for　the　lower-order　spatial　derivatives　of　the　perturbations　of　both　the　velocity　and　the　micro-rotational　velocity.　©　The　Author(s)　2024.