The invention discloses a solvent-free complex method of high temperature cooking complex films and bags and a complex device thereof. The complex method comprises the following steps of preprocessing a first film, placing the first film on a first unreeling device and passing through a guiding roller according to a complex trend of the film, and preheating an adhesive, a gumming device and a complex heat drum; placing a second film on a second unreeling device and passing through the guiding roller according to the complex trend of the film, regulating glue inlet capacity of the gumming device, producing, and finally rolling, curing and cooling. The complex device comprises the first unreeling device, the gumming device, the second unreeling device, the complex heat drum, a rolling device and a pulling roller wherein are arranged on a rack and a glue adding barrel for adding the adhesive in the gumming device. The complex method and the complex device provided by the invention have the advantages that the environmental pollution is not generated, the energy consumption is low, the space occupation is small and the like, the method can utilize air humidity under a certain environment temperature, and mechanical properties of the complex films are effectively improved.