The invention relates to precoated
coil coating for adhering a
polyester film and a using method thereof. The precoated
coil coating comprises the following compositions in percentage by
mass: 20 to 35 percent of film-forming resin in
solid, 0.5 to 5 percent of an auxiliary agent, 20 to 35 percent of
pigment and filling, and 25 to 50 percent of
solvent, wherein the film-forming resin consists of 70 to 95 percent of
polyester resin which is provided with hydroxy functional group and has number average molecular weight of between 3,500 and 20,000 and a
hydroxyl value of between 6 and 35, and 5 to 30 percent of crosslinked resin. The using method is to directly coat the precoated
coil coating for adhering the
polyester film on a steel plate which is treated by chemical transforming solution and laminate and adhere the polyester film on site, or directly coat the precoated coil
coating on a precoated coil which is precoated with priming coat, bake and cure the coil, and laminate and adhere the polyester film on site. The polyester film laminated precoated coil prepared by the precoated coil
coating has excellent
adhesive force, cup drawing and water boiling resistance.