Electromagnetic　(EM)　absorbing　and　shielding　materials　possess　critical　position　in　defence　field.　However,　traditional　absorbing　materials　failed　to　achieve　a　wide　absorption　band　because　of　the　impedance　mismatching　between　absorbing　materials　and　air.　And　Traditional　shielding　materials,　such　as　metals,　failed　to　meet　the　increasing　critical　needs　because　of　the　large　density,　low　corrosion　resistance,　difficulty　in　fabrication　of　complex　structures.　To　solve　these　problems,　a　metamaterial　composite　structures　with　good　performance　on　EM　absorbing　and　shielding　was　proposed.　The　composite　structure　consists　of　a　metamaterial　absorber　and　a　composite　shielding　structure.　The　metamaterial　absorber　is　composed　of　graphene　composite　metamaterial　whose　impedance　is　gradually　increased　by　tailoring　the　geometric　parameter　and　graphene　content.　The　shielding　structure　was　prepared　by　continuous　carbon　fiber　(CCF)　reinforced　composite.　The　composite　structure　was　fabricated　by　multi-process　3D　printing　technology,　with　which　different　composites　can　be　fabricated　integrally　without　assembly.　Experimental　results　showed　that　the　absorption　bandwidth　of　the　composite　structure　was　32　GHz　(4.5~14.5　GHz,　17~39　GHz),　and　the　shielding　effectiveness　was　larger　than　63　dB.　The　excellent　absorbing　and　shielding　performance　indicates　that　the　composite　holds　great　potentials　in　defense　and　that　the　design　and　fabrication　method　is　useful　for　improving　the　defence　survive　ability　in　complex　EM　environment　and　fabricating　EM　functional　structures　cheaply,　rapidly　and　facilely.　©　2021　Institute　of　Physics　Publishing.　All　rights　reserved.