The invention provides radiating aluminum plates for a flexible package battery pack. The battery pack comprises a fixed L plate, insulating parts, a box body and a battery module, wherein the battery module comprises two acrylonitrile butadiene styrene (ABS) insulating clamp plates, 15 radiating aluminum plates, 14 flexible package monomer batteries and battery connecting pieces; a groove for placing each monomer battery is formed on each radiating aluminum plate, and is positioned on one side surface of each radiating aluminum plate; the depth of each groove is matched with the lower part of a pole lug of each monomer battery; and at least one mounting hole is formed on each radiating aluminum plate. According to the radiating aluminum plates for the flexible package battery pack, the groove for positioning each monomer battery is formed on one side of each radiating aluminum plate, and a heating surface of each battery is closely attached to a groove surface, so that the aim of good radiating can be fulfilled; and a cooling passage is formed on the other side of each radiating aluminum plate, so that the radiating of the monomer batteries can be accelerated.