Abstract: The present invention discloses an optical-film traffic sign, which comprises: a light-guide element, an optical film and at least one light source. A plurality of diffusion dots is printed on the light-guide element. The light from the light source is repeatedly scattered by the diffusion dots. Thereby, the light-guide element becomes a highly uniform planar light source. The optical film having a traffic sign is applied onto the surface of the light-guide element to form a slim and uniformly-luminous traffic sign. The present invention may adopt LED as the light source and thus has the advantage of energy saving.