The utility model provides a belted steel piece polymer battery, including the frame, install in polymer electric core in the frame, with protection circuit board and steel sheet that polymer electriccore links to each other, the protection circuit board install in the top of frame, one side of the both sides of steel sheet this steel sheet reverse side of orientation is the perpendicular protruding side rib board that is equipped with respectively, the side rib board is fixed in in the frame. The utility model discloses both sides at the steel sheet set up the side rib board respectively perpendicularly towards the direction of steel sheet reverse side to when the processing preparation, need not to distinguish the positive and negative, and can directly fix the side rib board in the frame, thereby need not to paste the steel sheet at polymer electric core, can sparingly produce operation and corresponding artifical the preparation, improve production efficiency, reduce cost.