The utility model discloses a backward laminating machine, which comprises a base, an external bracket, a working platform, and an electric element box and a pneumatic element which are arranged inside the base, and is characterized in that the working platform is provided with an adhesive film platform and a base material platform which are arranged on two sides of the working platform respectively; two straight sliding rails reaching the bottom of the base material platform are arranged above the working platform and support and guide the sliding of the adhesive film platform, which comprises a mobile platform, a fine adjustment platform, a laminating platform, a rotating shaft bracket and a composite material plate; and the rotating shaft bracket is arranged above the laminating platform and fixed with the composite material plate. A manner of laminating the base material at the upside and the adhesive film at the underside is adopted to fix the adhesive film stably without a large adsorbability and avoid invalid drawing or the tensile deformation of the adhesive film caused by excessive drawing, and the phenomena of shedding and skipping.