NOVELTY - A method for manufacturing a composite polymer electrolyte membrane for a polymer electrolyte membrane fuel cell is provided to manufacture a composite polymer membrane which is thin, and has high ionic conductivity and physical strength by impregnating a porous membrane with polymer electrolyte resin in a form of perfluorosulfonyl halogen compound using various methods.    DETAILED DESCRIPTION - The method comprises the steps of impregnating an inert porous polymer membrane with a perfluorosulfonyl halogen compound resin; and converting the impregnated perfluorosulfonyl halogen compound into sulfuric acid by sequentially treating high temperature alkaline solution, sulfuric acid solution and ultra pure water on the coated polymer membrane, wherein the porous polymer membrane has a porosity of 30 to 90%, a pore size of 0.05 to 5.0 microns and a thickness of 10 to 150 microns, and is selected from the group consisting of porous poly tetrafluoroethylene membrane, polypropylene membrane, polyethylene membrane and poly vinylidene fluoride membrane, wherein the impregnating step is carried out in a method selected from the group consisting of a spraying, painting, tape casting, screen painting, dipping, calendering and doctor blade method at a temperature of 230 to 320 degrees C, wherein the method further comprises the steps of coating an electrolyte film on the surface of the manufactured composite electrolyte membrane and heating the electrolyte film coated composite electrolyte membrane in ultra pure water or vapor having a temperature of 80 to 150 degrees C for 1 or more hours, and wherein the electrolyte film is selected from the group consisting of perfluorosulfonyl fluoride and a polymer material in which an alkali metal ion such as sodium or potassium is substituted for perfluoro sulfonic acid, perfluorocarboxylic acid, polystyrene sulfonic acid, polystyrene carboxylic acid or their mixture, the coated film has a thickness of 1 to 50 microns, and the method for additionally coating the film is performed by a method selected from the group consisting of spraying, painting, tape casting, screen painting and dipping.