NOVELTY - A composite multilayer film has a polyolefin resin film (A) arranged on one surface of an aluminum layer (B) and polyamide layer (C) arranged on the other surface of the aluminum layer (B). The polyolefin resin film (A) has a layer (A-1) containing acid-modified polyethylene resin ( alpha ), and a layer (A-2) containing crystalline polyethylene resin ( beta ). The aluminum layer (B) is laminated on the layer (A-1). The 60%-crystallinity degree of the acid-modified polyethylene resin ( alpha ) is less than 60%-crystallinity degree of the crystalline polyethylene resin ( beta ).    USE - Composite multilayer film is used for cladding material of lithium-ion secondary battery used as motor vehicle battery, and electrical double layer capacitor (both claimed), and packaging material of strong soluble liquid, unprocessed aluminum liquid and iced confectionary e.g. ice cream. Uses include but are not limited to curry, shampoo, liquid detergent, repacking articles, retort foods, curry, industrial chemical agent, solution and solvent.    ADVANTAGE - The composite multilayer film has favorable adhesive strength and excellent low-temperature resistance.    DETAILED DESCRIPTION - A composite multilayer film has a polyolefin resin film (A) arranged on one surface of an aluminum layer (B) and polyamide layer (C) arranged on the other surface of the aluminum layer (B). Surface(s) of the aluminum layer is subjected to chromium conversion coating. The polyolefin resin film (A) has a layer (A-1) containing acid-modified polyethylene resin ( alpha ), and a layer (A-2) containing crystalline polyethylene resin ( beta ). The aluminum layer (B) is laminated on the layer (A-1). The 60%-crystallinity degree of the acid-modified polyethylene resin ( alpha ) is less than 60%-crystallinity degree of the crystalline polyethylene resin ( beta ). An INDEPENDENT CLAIM is included for manufacture of composite multilayer film.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of the composite multilayer film.    Polyolefin resin film (A)    Layer containing acid-modified polyethylene resin layer (A-1)    Layer containing crystalline polyethylene resin (A-2)    Aluminum layer (B)    Polyamide layer (C)    Polyester-type resin layer (D)