NOVELTY - A micro-vacuum spray molding techniques of compound proton exchange membrane for fuel battery, comprising techniques of PFSA attaching on the expansion polytetrafluoroethylene micro-pore basilemma.    USE - A micro-vacuum spray molding techniques of compound proton exchange membrane for fuel battery (claimed).    ADVANTAGE - The technology of invention solves the problems as following; in the manufacture techniques of compound membrane with same type, the deformation of polytetrafluoroethylene membrane is difficult to control; membrane thickness accuracy and production efficiency are low and so on; the compound membrane has no deformation of polytetrafluoroethylene micro-pore membrane and has characters of low request on the expending production, spray techniques and device accuracy and high equality on compound thickness of spray molding.    DETAILED DESCRIPTION - A micro-vacuum spray molding techniques of compound proton exchange membrane for fuel battery, comprising techniques of PFSA attaching on the expansion polytetrafluoroethylene micro-pore basilemma; the techniques of PFSA attaching on the expansion polytetrafluoroethylene micro-pore basilemma comprises compound membrane spray techniques and compound membrane heat setting techniques; the compound membrane spray techniques is following; (a) preparing PFSA spray liquor; dissolve the PFSA in the organic alcohol liquor and preparing 1.0-10.0wt% liquor and add organic agent with high boiling point; the quality of organic agent with high boiling point and PFSA is 1:1-8:1; (b) fixing the expansion polytetrafluoroethylene micro-pore basilemma on the steel frame; put the steel frame on the heating stage and use vacuum pump to draw a micro-vacuum in the space under the steel frame basilemma; (c) spraying PFSA liquor in (a) on the upper surface of expansion polytetrafluoroethylene micro-pore basilemma; when liquor is sprayed on the basilemma, hold the vacuum in the space under the steel frame basilemma; (d) when spray quantity on single surface reaches request, stop vacuum pumping and rotating steel frame; (e) spraying PFSA liquor in the step 1 on the other surface of expansion polytetrafluoroethylene micro-pore basilemma till reach preset quantity; the techniques progress of compound heat setting; and (f) putting the compound membrane in (e) in the oven box at 120-200 degrees C for drying and molding 1-6 hours.