NOVELTY - Anode plate and cathode plate are coated with modifying agent prepared using sodium hydroxide, potassium hydroxide, cesium hydroxide, francium hydroxide, ferric sulfate, water and graphite, bonded on both surfaces of plate film including polyvinyl chloride film, gradually pressed together, and connected with terminal conduction, to obtain battery. Terminal end of obtained battery is connected to positive current and negative current, modifying agent is penetrated into surface layer of anodic plate and cathode plate, and activated, to obtain bimetallic-modified solar battery.    USE - Production of bimetallic-modified solar battery used for electronic appliance.    ADVANTAGE - The method economically provides bimetallic-modified solar battery having favorable durability and high capacity.    DETAILED DESCRIPTION - Copper foil as an anode current collector and an anode plate, and aluminum foil as cathode current collector and cathode plate are selected. Two surfaces of the anode plate and the cathode are modified at 50-100 degrees C with modifying agent, to obtain electrode plate. Modifying agent is prepared as follows. Metal oxide raw material including (in parts mass) sodium hydroxide (0.1), potassium hydroxide (0.1), cesium hydroxide (0.1), francium hydroxide (0.1) and ferric sulfate (0.6) is added into water, alkali metal is added if the resultant solution is alkaline or ferric sulfate is added if the resultant solution is acidic, acid-alkali neutralization is carried out, iron in the obtained solution is oxidized into ferric oxide or protoxide, hydroxyl ion is reacted with sulfur to form sulfuric acid or sulfite, sodium oxide, potassium oxide, cesium oxide and francium oxide are reacted with ferric oxide or ferrous oxide to form complex and dried, to obtain modified metal oxide. Obtained modified metal oxide and graphite are added in mass ratio of 1:1, heated and dried, to obtain modifying agent. A polyvinyl chloride film is rolled to obtain plate film as separation film having thickness of 0.1-1 mm. The anode plate and the cathode plate are coated with the modifying agent, bonded on both surfaces of plate film, gradually pressed together, and anode plate and cathode plate are respectively connected with terminal conduction, to obtain battery. Terminal end of obtained battery is connected to positive current and negative current, modifying agent is penetrated into surface layer of anodic plate and cathode plate under action of current, processed for 5-15 minutes, and anode plate and cathode plate of battery are activated, to obtain bimetallic-modified solar battery. The anode plate and the cathode plate have thickness of 0.1-2 mm.