Abstract: By adding carbon black, ferrite and metal powders, polyacrylonitrile(PAN) based carbon fiber felts and epoxy resin were used to make a new kind of structural material for the application of radar microwave absorption. The material with area density of 5.2 kg/m² achieved maximum absorbing value of -13.37 dB, and minimum value of -10 dB over the whole frequency range (8～18 GHz). The absorbing mechanisms were discussed using theory of electromagnetic scattering