▎ 摘　　要

NOVELTY - Wave-absorbing polymethacrylimide foam composite material, comprises an inner-layer sandwich material and skin attached to the upper surface and the lower surface of the inner-layer sandwich material respectively, where the inner-layer sandwich material is the polymethacrylimide foam composite material, where the wave-absorbing polymethacrylimide foam composite material prepared by using carbon fiber fabric prepreg to coating the surface of carbon fiber with ferrite materials and various ultra-micro particles capable of absorbing infrared and microwave, then paving the carbon fiber prepreg on a skin mold, packaging and bagging for curing, finally coating a layer of glue film on the cured skin, adhering the glue film on the upper surface and the lower surface of the polymethacrylimide foam composite material and then curing the glue film to obtain the product. USE - Used as wave-absorbing polymethacrylimide foam composite material. ADVANTAGE - The composite material: is light weight; has thin thickness and strong absorption capacity on the electromagnetic waves of different wave bands; and avoids the monitoring of radar.