NOVELTY - Photoelectric porous film cathode preparation involves taking graphite powder (6.5 g) in beaker (500 ml). Deionized water (10 ml) is added to the obtained material, and then boiled for 2 hours. The obtained material is filtered, and then dried in an oven at 95 degrees C for 12 hours to obtain product. The obtained product is placed into a beaker (500 ml). Concentrated hydrochloric acid (0.45mol/L) is added, and then stirred for at 95 degrees C for 6 hours. The obtained material is dried in an oven for 24 hours to obtain product. Nickel is placed in the beaker (500 ml), and then deionized water is added.    USE - Method for preparing photoelectric porous film cathode (claimed).    ADVANTAGE - The method is simple.    DETAILED DESCRIPTION - Photoelectric porous film cathode preparation involves taking graphite powder (6.5 g) in beaker (500 ml). Deionized water (10 ml) is added to the obtained material, and then boiled for 2 hours. The obtained material is filtered, and then dried in an oven at 95 degrees C for 12 hours to obtain product. The obtained product is placed into a beaker (500 ml). Concentrated hydrochloric acid (0.45mol/L) is added, and then stirred for at 95 degrees C for 6 hours. The obtained material is dried in an oven for 24 hours to obtain product. Nickel is placed in the beaker (500 ml), and then deionized water is added. The obtained material is boiled, and then the obtained material is cleaned with deionized water Concentrated hydrochloric acid is added to the obtained material. The obtained product B is added to the obtained nickel network, and then dried to obtain product. Potassium chloride solution (4.5mol/L) is added in a beaker. Nonyl phenol polyoxyethylene ether water solution (40 ml) and ethanol (35 ml) are added to the obtained material. Polytetrafluoroethylene liquid (7.5 ml) is added to the obtained material obtain solution, and then heated at solution A at 95 degrees C at constant temperature water bath to obtain paste. The obtained paste is coated on obtained substance to obtain the desired product.