The invention relates to a double-core cable for aviation. The double-core cable comprises two parallel fibers, wherein an outer surface of each fiber is coated with a polyimide coating layer, the polyimide coating layer is externally provided with a polyethersulfone jacket layer, two sides of the two fibers are provided with two aramid fiber enhancement cable reinforcement cores (KFRP), an outer sheath is arranged at periphery of the two fibers and the two aramid fiber enhancement cable reinforcement cores (KFRP), the polyimide coating layer is formed through coating polyimide at an outer surface of the fiber and curing the coated fiber through utilizing UV, a coating speed is 150-180 m/min, and wavelength of the UV is 365-395nm. The double-core cable is advantaged in that the polyimide coating layer is formed through coating polyimide at an outer surface of the fiber and curing the coated fiber through utilizing UV, the coating speed is fast, a coating outer diameter has good uniformity, creep performance and tensile performance of the cable are excellent, and the cable further has properties of high temperature resistance, hydrolysis resistance, acid and alkali resistance, nontoxicity, flame retardation and fuel oil resistance.