To enhance the microwave absorption performance of silicon carbide nanowires(SiCNWs), SiO_2 nanoshells with a thickness of approximately 2 nm and Fe_3O_4 nanoparticles were grown on the surface of SiCNWs to form SiC@SiO_2@Fe_3O_4 hybrids. The microwave absorption performance of the SiC@SiO_2@Fe_3O_4 hybrids with different thicknesses was investigated in the frequency range from 2 to 18 GHz using a free-space antenna-based system. The results indicate that SiC@SiO_2@Fe_3O_4 hybrids exhibit improved microwave absorption. In particular, in the case of an SiC@SiO_2 to iron(III) acetylacetonate mass ratio of 1:3, the microwave absorption with an absorber of 2-mm thickness exhibited a minimum reflection loss of-39.58 d B at 12.24 GHz. With respect to the enhanced microwave absorption mechanism, the Fe_3O_4 nanoparticles coated on SiC@SiO_2 nanowires are proposed to balance the permeability and permittivity of the materials, contributing to the microwave attenuation. To enhance the microwave absorption performance of silicon carbide nanowires (SiCNWs), SiO 2 nanoshells with a thickness of approximately 2 nm and Fe 3 O 4 nanoparticles were grown on the surface of SiCNWs to form SiC @ SiO_2 @ Fe_3O_4 hybrids. The microwave absorption performance of the SiC @ SiO_2 @ Fe_3O_4 hybrids with different thicknesses was investigated in the frequency range from 2 to 18 GHz using a free-space antenna-based system. The results indicate that SiC @ SiO_2 @ Fe_3O_4 hybrids exhibit improved microwave absorption. an SiC @ SiO_2 to iron (III) acetylacetonate mass ratio of 1: 3, the microwave absorption with 2-mm thickness was a minimum reflection loss of-39.58 d B at 12.24 GHz. With respect to the enhanced microwave absorption mechanism , the Fe_3O_4 nanoparticles coated on SiC @ SiO_2 nanowires are proposed to balance the permeability and permittivity of the materials, contributing to the microwave attenuation.