The invention discloses a multifunctional advertisement film preparation method and belongs to the field of film materials. The multifunctional advertisement film preparation method includes the steps of preparing raw materials including, by mass, 100 parts of PVC (polyvinyl chloride), 15-30 parts of plasticizers, 2-4 parts of barium-zinc composite stabilizers, 0-4 parts of nanometer fillers, 0.5-1.5 parts of uvioresistant materials UV531, 0.1-1 part of antioxidant CB, 1-2 parts of ACRs (accelerants) and 0.01-0.05 part of rutile titanium dioxide powder; metering the raw materials by a metering device, mixing and stirring by a high-speed mixing device, stirring by a cooling and stirring device, plastifying by a high-temperature plasticator, melting and extruding by a screw extruder, rolling, cooling and reeling to obtain the required film. The multifunctional advertisement film preparation method has the advantages that a polyester plasticizer is adopted, the molecular weight of the polyester plasticizer is controlled above 600, and due to the large molecular weight, the plasticizer of the formed rolled automobile film is less prone to transferring in a high-temperature environment, loss of the plasticizer is postponed, aging resisting performance of the film can be enhanced substantially, and falling of the film can be prevented.