The invention discloses a multilayer composite food packaging film. The multilayer composite food packaging film is a food packaging film with a three-layer composite structure formed by an inner heat-seal layer (PET layer), a middle barrier layer (PEN layer) and an outer printing layer (nylon layer); the inner heat-seal layer (PET layer) has excellent high barrier property and good heat-seal performance and pollution resistance and further has certain fragrance-preserving performance; the middle barrier layer (PEN layer) has very excellent barrier property, meanwhile, and PEN has excellent solvent resistance and high-temperature resistance and is capable of absorbing ultraviolet light, so that the deterioration of foods is avoided; and the outer printing layer (nylon layer) has excellent puncture resistance, tenacity, reasonable mechanical structure, high temperature resistance, relatively good moisture barrier property and excellent low-high temperature resistance drawing molding property, so that the problems of deformation in an automatic packaging process, warping in a subsequent packaging process and the like can be prevented.