▎ 摘　　要

NOVELTY - Composite material comprises a structural layer, a radar absorbing layer and an infrared suppressing layer in sequence from the inside to the outside. The structural layer includes resin matrix wires and continuous fibers. The radar absorbing layer includes a first modified resin matrix wire and continuous fibers. The infrared suppression layer includes second modified resin matrix wires, continuous fibers and media. USE - The composite material is useful in stealth equipment (claimed). ADVANTAGE - The composite material has radar wave-absorbing function and infrared suppression function in the way of three-dimensional printing greatly reduces interface effect between the substrate and the functional material, has improved mechanical property, radar wave absorbing/infrared inhibiting function, good mechanical property. The method has obvious light weight effect, is simple, green and environmentally friendly, and high structure reliability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing composite material comprising (1) drying resin masterbatch, (2) carrying out first doping substance and second doping substance in the screw extruder to carrying out melt extrusion doping modification respectively to obtain first modified resin matrix wire rod and the second modified resin matrix wire rod, (3) melting resin matrix wire rod and continuous fiber in the screw extruder, extruding and printing after blending to obtain structural layer, (4) preparing radar absorbing layer on the structural layer, melting and blending first modified resin matrix wire and continuous fiber, extruding and printing to obtain radar absorbing layer, and (5) preparing an infrared suppression layer on radar absorbing layer, extruding and printing second modified resin matrix wire and continuous fiber after melt blending to obtain composite material.