A　new　type　of　ternary　core-shell　composites,　carbonyl　iron　powder@Fe3O4@polyaniline　(CIP@Fe3O4@PANI)　has　been　successfully　prepared　by　a　two-step　method.　The　morphology,　structure,　composition,　and　the　performances　of　microwave-absorbing　and　corrosion　resistance　of　the　prepared　composites　were　investigated　via　a　series　of　characterization　methods.　Fe3O4　surrounding　CIP　could　adjust　the　electromagnetic　parameter　and　enhancing　the　impedance　matching　of　CIP　and　space　electromagnetic　waves,　while　PANI　could　adjust　the　absorbing　frequency　band　and　prevent　the　corrosion　of　CIP　particles.　The　test　results　indicated　that　CIP@Fe3O4@PANI　composites　had　superior　magnetic　properties,　oxidation　resistance,　and　high　saturation　magnetization　as　well　as　good　stability　in　high　temperature　air　atmosphere.　Besides,　the　CIP@Fe3O4@PANI　contained　coating　showed　better　corrosion　resistance　than　neat　epoxy　and　CIP　coating.　Due　to　the　excellent　properties,　CIP@Fe3O4@PANI　composites　can　be　an　outstanding　candidate　for　the　rapid　development　of　broadband　shielding　and　anticorrosive　materials.　©　2021