Sticking type retroreflective film and preparation method thereof

The invention relates to a sticking type retroreflective film, successively comprising four layers from top to bottom: a protection layer, a retroreflective layer, a sticking layer and a substrate layer, wherein the substrate layer is composed of a base material, an adhesive and an isolating film. A preparation method comprises: first, uniformly spraying the sticking layer on the surface of the substrate layer to form a stable structure; secondly, before complete solidification of the sticking layer, uniformly spraying the retroreflective film on the surface of the sticking layer; and finally, covering the transparent sticking layer on the surface of the retroreflective film to form the sticking type retroreflective film. The sticking type retroreflective film is prepared by employing four layer composite technology, and is simple and convenient to use; through a retroreflective microstructure, the sticking type retroreflective film possesses excellent retroreflective effects; an outer layer is covered by the protection layer, thereby prolonging the service life; meanwhile, preparation processes are simple, and raw materials are easy to obtain, thereby facilitating processing line production.