The invention discloses a compression molding technology capable of improving fiber composite appearance by means of a polymeric film. The compression molding technology comprises the steps that fiber composite cloths and the polymeric film are cut according to the structural design specification size and then cleared up for use; the fiber composite cloths are folded in a rowed mode and layered up according to the mechanical structural design requirements, and the polymeric film is attached to the outermost layer of the fiber composite cloths; a rolled product is put on a heating platform with the temperature ranging from room temperature to 80 DEG C to be preheated for 3-60 min, gas among layers is exhausted in an extruding mode as much as possible, the product is pressed to be smooth and then put into a pre-molding mold, and pre-molding is conducted according to the shape designed by the pre-molding mold; the product is put into a mold to be molded; the mold obtained after molding is delivered to a cooling platform to be cooled and then delivered to a demolding platform, the product is taken out by opening the mold, and the smooth and plump product appearance is obtained. According to the technical scheme, a traditional tedious soil-supplementing repairing technology is replaced, and the high-quality fiber composite product appearance can be directly obtained through preparation.