TECHNOLOGY FOCUS - POLYMERS - Preparation: The preparation method of the fuel cell membrane electrode layer based on poriferous proton exchanging membrane comprises: (a) disposing the catalyst layer on the surface of carbon paper that is smeared with micropore layer or water management layer, heat pressing at 120-200 degrees C and at 2-3 MPa for 70-100 seconds, to obtain the gas diffused layer electrodes, where carbon paper is dipped with polytetrafluoroethylene hydrophobing agent, calcining at 340-350 degrees C for 25 minutes, where content of polytetrafluoroethylene is 25 wt.% and water management layer comprises polytetrafluoroethylene and conductive carbon black particle, calcining at 340-350 degrees C for 20-30 minutes, forming; and (b) disposing proton exchanging membrane between two same gas diffused layer electrodes, where the membrane contacts with the catalyst layer, and heat pressing at 120-200 degrees C and at 2-3 MPa for 70-100 seconds to obtain fuel cell membrane electrode assembly. Preferred Composition: The thickness of the poriferous proton exchanging membrane is less than or equal to 10 mu m having porosity of greater than or equal to 60%, and average opening diameter is less than or equal to 2 mu m. The thickness of poriferous proton exchanging membrane is 5 plus minus 1 mu m having porosity of greater than or equal to 80%, and average opening diameter of 0.5-1 mu m. Preferred Process: The oxidization process of loading type noble metal simple substance or noble metal alloy that is pre-oxidized comprises placing catalyst noble metal simple substance or noble metal alloy in nitric acid (HNO3), sulfuric acid (H2SO4), hydrogen peroxide (H2O2), ammonium peroxydisulfate ((NH4)2S2O8), sodium hypochlorite (NaClO), perchloric acid (HClO4) or phosphoric acid (H3PO4) oxidant, heating at negative 100 degrees C of room temperature, refluxing for 2-10 hours, filtering, cleaning with de-ionized water, and drying for 12-24 hours in vacuum at 70-100 degrees C. Preferred Process: The fuel battery catalyst layer based on poriferous proton exchange membrane is prepared by preparing catalyst paste, dipping the poriferous proton exchange membrane into catalyst paste, drying the poriferous proton exchange membrane that is dipped in the catalyst paste in vacuum, repeating the process for 1-3 times, and heat pressing to obtain fuel cell catalyst layer based on poriferous proton exchanging membrane. Preferably, the fuel battery catalyst layer based on poriferous proton exchange membrane is prepared by: (a) dispersing the catalyst in the solvent, adding 1-20 wt.% proton exchanging resin in catalyst without oxidation treatment, or dispersing it sufficiently in vacuum condition, obtaining catalyst paste, where the weight proportion of the catalyst and the solvent is 1:5-20, having solvent of water, alcohol or alcohol solution, and alcohol is methanol, ethanol, propyl alcohol or isopropyl alcohol, where the weight proportion of water and alcohol in alcohol solution is 1:1-100, and the proton exchanging resin is the same as the proton exchanging resin of poriferous proton exchanging membrane; (b) dipping poriferous proton exchanging membrane in catalyst paste, taking it out and drying at 70-100 degrees C in vacuum, repeating process for 1-2 times, boiling in 0.5 M sulfuric acid (H2SO4) solution for 1-2 hours, sufficiently dipping and washing with deionized water, and vacuum drying to obtain poriferous proton exchanging membrane filled with catalyst; and (c) heat pressing poriferous proton exchanging membrane filled with catalyst at 120-200 degrees C and at 2-5 MPa for 0.5-2 minutes, to obtain the fuel cell catalyst layer based on poriferous proton exchanging membrane. The preparation method of the fuel battery catalyst layer based on porous proton exchange membrane also comprises: (a) arranging the polytetrafluoroethylene membrane-catalyst layer-proton exchange membrane-catalyst layer-polytetrafluoroethylene membrane in turns to be five-for-one superposed component; and (b) heat pressing five-for-one superposed component for 70-100 seconds at 100-200 degrees C and at 2-3 MPa, cooling to room temperature, removing the extremely external polytetrafluoroethylene membrane, and obtaining cell membrane electrode assembly.