The invention discloses an H-shaped fin economizer, which comprises a heating tube. Two groups of first fins are symmetrically distributed on the left and right sides of the heating tube, and second fins and third fins are evenly distributed between every two adjacent first fins. Every two adjacent second fins are fixedly connected by a first curved strip on the side away from the heating tube, and two adjacent third fins are fixedly connected by a second curved strip on the side away from the heating tube. A first limiting mechanism for limiting the plurality of second fins is arranged on theheating tube, and the heating tube is provided with a second limiting mechanism for limiting the plurality of third fins. The H-shaped fin economizer is reasonable in structure. The plurality of second fins and the plurality of third fins can be arranged on the heating tube by means of splicing and combining, and can be disassembled when cleaning is needed, thereby increasing the spacing for facilitating cleaning. The density of the whole fin does not need to be decreased for cleaning, so as to ensure the heating effect.