NOVELTY - Processing ultra-thin type graphite bipolar plate used in fuel cell comprises: (a) cutting the graphite raw material into the requirement thickness; (b) putting the graphite bipolar plate stock into the thermosetting resin solution; (c) having the heat solidification treatment to the dipped graphite bipolar plate stock; (d) removing the surface of 0.5-1.5 mm of the dipped graphite bipolar plate stock by the milling or grinding method; (e) using the mechanical processing method to process the channel; and (f) having the permeability test to the processed graphite bipolar plate.    USE - The method is useful for processing ultra-thin type graphite bipolar plate used in fuel cell (claimed).    ADVANTAGE - The method can greatly reduce the weight and volume of the cell stack or it can greatly raise the output power of the cell stack under the same weight and volume.    DETAILED DESCRIPTION - Processing ultra-thin type graphite bipolar plate used in fuel cell comprises: (a) cutting the graphite raw material into the requirement thickness and getting 1-3 mm beside, using the de-ionized water to clean and drying; (b) putting the graphite bipolar plate stock into the thermosetting resin solution to have the vacuum dipping treatment, the vacuum pressure is negative 0.08 to negative 0.1 MPa, the dipping time is 6-24 hours; the dipping time is proportional to the thickness of the graphite bipolar plate; the density of the graphite bipolar plate stock is 1.90-1.95 g/cm3; (c) having the heat solidification treatment to the dipped graphite bipolar plate stock, the solidification temperature is 80-200 degrees C, the time is 8-26 hours; (d) removing the surface of 0.5-1.5 mm of the dipped graphite bipolar plate stock by the milling or grinding method; (e) using the mechanical processing method to process the channel according to the design requirement of the channel to obtain the graphite bipolar plate; and (f) having the permeability test to the processed graphite bipolar plate at 0.1 MPa.