Efficient waste heat recovery device

According to the efficient waste heat recovery device, the heating surface is designed into the double-layer pipe with the fins, and the space between the inner pipe and the outer pipe is vacuumized, so that the heat transmission performance is greatly improved, heat transfer of a boiler is facilitated, heat in high-temperature gas generated in the industrial production process is recovered by the efficient waste heat recovery device, and the energy consumption is reduced. The waste heat recovery device comprises a frame box, a plurality of waste heat recovery structures are arranged in the frame box, a plurality of supporting legs are arranged at the bottom of the frame box, the four faces of the frame box are each of a blocking structure, and a dust discharging pipe is arranged at the bottom of the frame box. A smoke inlet is formed in the right side of the frame box, a smoke outlet is formed in the left side of the frame box, the waste heat recovery structures comprise a plurality of inner pipes and a plur