The research focused on detecting solvent residues in two typical composite film bags made of biaxially oriented polypropylene/low-density polyethylene (BOPP/LDPE) and nylon/cast polypropylene (PA/CPP), and investigated their migration patterns. The non-compliance rate of solvent residue in the selected two typical material samples is 90%. After 18 months of storage at room temperature, the total solvent residue in BOPP/LDPE samples decreased by 95%, and the total solvent residue in PA/CPP samples decreased by more than 88.2%. Four different temperatures were tested, and after 1 hour at 80 ℃, the residual solvents in the BOPP/LDPE samples evaporated completely; the total amount of solvent residue in PA/CPP samples decreased by more than 95.8%. Both an increase in experimental temperature and an extension of time will cause a decreasing trend in the total solvent residue and benzene residue in the composite film bag. The material, test temperature, and test time of plastic composite film bags for food have important effects on the migration pattern of solvent residues in two typical material samples. It is suggest revising the corresponding testing method standards, actively promoting the evaluation of green packaging for products, and better ensuring the quality of plastic composite film bags for food.