NOVELTY - A mixed solution is obtained by mixing modified phenolic resin, epoxy resin and mixed solution of acetone and ethanol. Curing agent is added in a dipping tank at 20-30 degrees C. Carbon fiber paper is impregnated in mixed solution and dried. Electrode plate made of stainless steel plate as template, is cleaned, kraft paper is paved on the steel plate. Steel plate, polyethylene release film, carbon fiber paper, polyethylene release film, steel plate, kraft paper and cold-rolled steel plate are laminated, hot-pressed, cooled, and carbonized to obtain porous diffusion layer electrode plate.    USE - Manufacture of porous diffusion layer electrode plate for fuel cell.    ADVANTAGE - The porous diffusion layer electrode plate has uniform porous structure, excellent gas permeability, low resistivity, high electron conduction capability, tight structure, smooth surface, favorable mechanical strength, and stable chemical properties and thermal stability. The porous diffusion layer electrode plate has porosity of more than 75%, resistivity of less than 0.05 Omega .cm, and gas diffusion coefficient of more than 0.15 cm2/second.    DETAILED DESCRIPTION - A mixed solution is obtained by mixing modified phenolic resin, epoxy resin and mixed solution of acetone and ethanol. The weight ratio of modified phenolic resin and epoxy resin is 1:1-3. The weight ratio of acetone and ethanol is 1:1. The total amount of modified phenolic resin and epoxy resin is 30-50%. 4-6 wt.% Boron-based amine complex curing agent and 0.5-2 wt.% phenolic amine epoxy curing agent are added in a dipping tank at 20-30 degrees C. Carbon fiber paper is impregnated in mixed solution of modified phenolic resin and epoxy resin, and dried. Electrode plate made of stainless steel plate with size of 3-5 mm as template, is cleaned, kraft paper is paved on the steel plate. Stainless steel plate, high-temperature resistant polyethylene release film, carbon fiber paper, polyethylene release film, stainless steel plate, kraft paper and cold-rolled steel plate are laminated, hot-pressed, cooled, cut and carbonized at 2800-3200 degrees C in a carbonization furnace to obtain porous diffusion layer electrode plate.