Abstract: In order to develop a kind of electrically heated composites which can be used for anti-icing/de-icing protection of aircraft, three kinds of weft knitted biaxial fabric/epoxy resin composites were designed and prepared, and the effects of density of the resistance wire arrangement on the electrothermal properties and interlaminar shear properties of the composite were studied. The upper and lower layers of the electrically heated composite are glass fiber/epoxy resin prepreg, and the intermediate layer is electrically heated weft woven biaxial fabric, which is lined with warp yarn, binding yarn and weft yarn respectively using copper-nickel alloy wire, polyester fiber and glass fiber. Infrared temperature tester and material universal testing machine were used for the performance testing. The results show that: after applying voltage for 6 s, the surface temperature of the composite increases rapidly, and reaches the maximum equilibrium temperature around 60 s. The maximum equilibrium temperature of the composite surface is in direct proportion to the applied voltage; When the applied voltage is unchanged, the lower the density of the wire, the higher the maximum equilibrium temperature of the composite surface.The lower the arrangement density of the resistance wire, the greater the interlaminar shear strength of the composites. The density of the resistance wires is low, and the interlaminar shear strength of the composite is higher. The weft woven biaxial fabric/epoxy resin electrically heated composites has the characteristics of light weight, high strength, high heating rate, good formability and so on, which is suitable for anti-icing/de-icing of multiple parts of aircraft.