Electromagnetic shielding composite material and preparation method thereof

The invention relates to an electromagnetic shielding composite material and a preparation method thereof. The electromagnetic shielding composite material comprises the following components in partsby weight: 100 parts of matrix resin, 15-20 parts of metallized carbon fibers, 10-12 parts of FeSiAl alloy powder, 6-8 parts of silver-plated carbon nanotubes, 3-5 parts of a toughening agent, 0.3-0.6part of a coupling agent, 0.5-1 part of a compounded antioxidant and 0.2-0.3 part of a lubricant. The electromagnetic shielding composite material provided by the invention is high in electromagneticshielding effect, and the high strength of a composite material molded part can be maintained. According to the preparation method provided by the invention, the combination of the metallized carbonfiber and the FeSiAl alloy powder with the matrix resin can be increased, the catalytic aging of various metal components in a material system to a plastic matrix is weakened, the excessive crushing of the carbon fiber in the mi