▎ 摘　　要

NOVELTY - Method for preparing a broadband wave-absorbing composite material, involves (1) dispersing carbon nanotubes and MXenes in aqueous dispersion liquid to obtain a wave absorbing agent slurry, (2) adding high molecular particles with different sizes to wave absorbing slurry and mechanically stirring, filtering and vacuum drying to obtain high molecular surface coated with wave absorbing component, and (3) spreading the content of different wave absorbing agents and/or wave absorbing particles of different sizes and sizes in a hot pressing mold according to the multi-layer design solution requirement and (4) closing the hot press mold to obtain the broadband wave absorbing composite material by hot pressing molding. USE - Method for preparing broadband wave-absorbing composite material used in military aircraft, ship and other equipment. ADVANTAGE - The method enables to prepare broadband wave-absorbing composite material that enhances the scattering and multiple reflection attenuation of incident electromagnetic wave, and enhances wave absorbing performance.