▎ 摘　　要

NOVELTY - The composite material has a first heat insulation layer (100), a wave-transmitting layer (200), an electric loss absorbing layer (300), a reflection layer (400) and a second heat insulation layer (500) all arranged in sequence from top to bottom. The electric loss absorbing layer includes a multilayer structural layer and a multilayer electrical impedance matching layer. Each layer of electrical impedance matching layer and each layer of structural layer are stacked alternately. The thickness of each structural layer is different. The surface resistance of each electrical impedance matching layer is different. USE - Wave-absorbing structural composite material used for wave-absorbing coatings and wave-absorbing patches such as corrosion, peeling and cracking to achieve radar technical indicators. ADVANTAGE - The composite material has excellent wave-absorbing performance, and excellent mechanical strength and high temperature resistance. Each layer of electrical impedance matching layer and each layer of structural layer are stacked alternately, which can ensure that the electromagnetic waves transmitted to the electric loss absorbing layer are absorbed, thus enhancing the absorbing performance of the absorbing structure composite material. The composite material achieves multiple absorptions of electromagnetic waves through the multi-layer structure design of the wave-absorbing structure composite material, which can ensure that most of the electromagnetic waves are absorbed, cooperate with the first heat insulation layer and the second heat insulation layer in the present invention, and make the wave-absorbing structure composite material have excellent wave-absorbing performance while having excellent temperature resistance and heat insulation performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of the wave-absorbing structure composite material. DESCRIPTION OF DRAWING(S) - The drawing shows a structure schematic diagram of a wave-absorbing structural composite material. 100First heat insulation layer 200Wave-transmitting layer 300Electric loss absorbing layer 400Reflecting layer 500Second heat insulation layer