The invention belongs to the technical field of enameled wire production technologies, and particularly relates to a processing technology of a copper enameled wire with high painting fastness. The processing technology specifically comprises the steps of wire drawing, paying off, annealing, cleaning, painting, baking and curing, and taking up. Wire drawing and paying off are carried out for many times to obtain a copper wire, then the cooper is annealed, and the annealed copper ispolished and cleaned to remove surface burrs of the copper wire and increase the surface roughness, so paint adhesion is facilitated; and the paint and the surface of the copper wire are tightly and uniformly bonded through multiple times of painting and two times of pressurization, meanwhile, drying of the surface of the paint is accelerated by increasing the temperature in a pressurization machine, and finally the paint is more stable through baking and curing, so the prepared enameled copper wire is uniform and stable in paint layer, high in fastness, not easy to fall off and high in breakdown strength.