The utility model relates to a boiler, and aims to provide a waste heat recovery dust remover which is fast in yielding Water, good in water quality, and energy-saving. The waste heat recovery dust remover comprises a body. A dust remover water inlet and a water outlet are formed in the body. An automatic float switch, a scattered bell mouth, a dam ring and an induced draft fan connection flange are arranged in the body. One way of tap water enters the dust remover through the dust remover water inlet, when the tap water reaches the highest dust removal water level, and the automatic float switch is closed. Smoke of the furnace enters the scattered bell mouth through a smoke pipe, under the effect of the scattered bell mouth, the smoke rushes out of the water and is dammed through the dam ring. Splashed water enters the induced draft fan connection flange and is discharged through forced induced wind of the induced draft fan. The other way of the tap water enters a waste heat recovery pipe through the water inlet to take away the waste heat which is left in the water by the smoke pipe and discharges the waste heat through the water outlet. The waste heat recovery dust remover also has the advantages of cooling the smoke, reducing the size of the smoke, increasing the supply quantity of boiler combustion-supporting oxygen, and reducing full-load ratio of the induced draft fan (variable frequency induced draft fan).