Graphite microchip and boron powder composites were adopted to prepare a kind of epoxy resin conductive adhesive film. The electrical and mechanical properties of the films were studied by the insulation tester and tension testing machine. The results show that the resistance value and shear strength decrease obviously with the amount of graphite and boron powder increasing. When the dosage of the graphite and boron powder is 14.5 phr and 20 phr respectively, the resistance of the film is about 100 MΩ and the shear strength is about 20 MPa. Scanning electron microscope (SEM) images show that the graphite microchips are distributed by lamellar layer in the resin system, which is beneficial for the construction of conductive networks. The volume resistivity and the surface resistivity of the film are 7.29×10₇ Ω·m and 1.26×10₉ Ω, respectively. The glass transition temperature of the film is about 125 ℃ and the 5% mass loss temperature reaches 347 ℃.The cured film has the characteristic of maintaining its own shapeand represents a wide processing window under 120 ℃. The conductive film is expected to be applied in the composite protection against lightning strikes.