The invention discloses a composite pasting film with the electromagnetic field shielding function. The composite film comprises a PET insulating layer, a metal layer, a wave absorbing layer and a release material layer. A first adhesive layer is disposed between the PET insulating layer and the metal layer, a second adhesive layer is arranged between the metal layer and the wave absorbing layer, and a plurality of parallel prism protruding parts are arranged on the surface, making contact with the wave absorbing layer, of the metal layer. The wave absorbing layer is formed by mixing the components comprising, by weight, 100 parts of wave absorbing powder, 20-35 parts of butyl acrylate, 10-20 parts of acrylic acid, 20-35 parts of 2-ethylhexyl acrylate, 10-30 parts of methyl methacrylate, 1-3 parts of vinyl acetate, 0.1-1 part of methacrylic acid-2-hydroxyethyl, 0.5-2 parts of sodium polyacrylate and 0.4-1 part of methyl ethyl ketone peroxide. The composite pasting film with the electromagnetic field shielding function increases the utilization rate of a reflection electromagnetic field of the metal layer, remarkably improves wave absorbing performance of protective adhesive tape, avoids over-concentration of heat and facilitates heat diffusion.