The invention relates to a composite film depressing module. The composite film depressing module comprises a machine table, wherein a composite film is arranged in the middle of the machine table; a stopper is arranged on the machine table at one side of the composite film; two brackets are further arranged at the two sides of the composite film separately; a cantilever is arranged on the two brackets and stretches just above the composite film; a fixing block is arranged at the exact middle of the cantilever, and one end of the fixing block is fixed with the cantilever; the other end of the fixing block extends out of the cantilever and is fixed with a depressing air cylinder; a piston rod of the depressing air cylinder downwards penetrates through the fixing block and is connected with a depressing linkage pin; an air cylinder speed regulating valve is arranged at the top end of the depressing air cylinder. According to the composite film depressing module provided by the invention, a depressing action on the composite film can be automatically carried out in a staged manner, a middle film and a bottom film in the composite film are prevented from separating, and thus the quality of film-stuck products is guaranteed.