▎ 摘　　要

NOVELTY - Preparation of electromagnetic wave absorbing material with multiple structure design comprises dispersing fresh graphene oxide in organic solvent to obtain graphene oxide solution; uniformly dispersing 10-200 nm micro-nano structure oxide in organic solvent to obtain micro-nano structure oxide solution; transferring micro-nano-structure oxide solution graphene oxide solution, and dispersing to obtain mixed solution of micronano structure oxide and graphene oxide; hydrothermally reacting for 10-13 hours at 80-250 degrees C, naturally cooling to room temperature, and forming three-dimensional porous composite material with micro-nanostructure; and designing micro-structure composite material to form metamaterial structure, cutting three-dimensional porous foam material of micro-nanostructure into designed regular shape by laser cutting method. The structure unit is formed by stacking up and down. Then multiple structure units are overlapped to form super-material structure with large area. USE - The method is used for preparing electromagnetic wave absorbing material for aircraft, aerospace field and ground armored car (claimed).