The utility model discloses a double-fin tube sheet structure for an air cooler, which comprises an inner fin, a formed tube sheet and an outer fin. A tube sheet inner cavity is a channel for hot fluid to flow through. The inner fin divides the tube sheet inner cavity into a plurality of units. The outer fin is welded to the outside of the tube sheet. The tube sheet is formed by fastening two sheet pieces molded by cold press. The inner fin is connected to the formed tube sheet in welded mode. The formed tube sheet is connected with the outer fin in welded mode. The double-fin tube sheet structure for the air cooler enables the hot fluid to directly flow in and out, the porous fins are utilized to divert flows inside the tube sheet, the outer fin is utilized to dissipate heat outside the tube sheet, and the double-fin tube sheet structure has the advantages of improving heat transfer capacity and cooling efficiency of a fin air cooler and the like.