The invention discloses a multilevel energy-saving afterheat recovery device. The multilevel energy-saving afterheat recovery device comprises a main body, an inner cavity, a smoke outlet and a smoketreatment device; an inner cavity is formed in the main body; a motor is mounted at the upper part of the left side of the main body; a conical heat collecting cavity is formed in the left side of theinner cavity; a spiral heat conducting body is mounted in the conical heat collecting cavity; a heat collecting block is arranged on the right side of the conical heat collecting cavity; the lower part of the heat collecting block is fixedly connected with a first heat conducting pipe; the lower part of the first heat conducting pipe is fixedly connected with a heat exchanger; a disc heat conducting body is arranged on the right side of the inner cavity; a smoke outlet is formed in the right side of the main body; and the right side of the smoke outlet is connected with the smoke treatment device. The multilevel energy-saving afterheat recovery device achieves the purposes of energy conservation and environmental protection through multilevel after recovery, can effectively improve the heat transfer efficiency, and increases the contacted area of smoke with the disc heat conducting body and the spiral heat conducting body.