The invention discloses a steam generation device utilizing waste heat of a boiler and relates to the technical field of waste heat utilization equipment. According to the steam generation device utilizing the waste heat of the boiler, the problem of the unsatisfactory waste heat utilization effect in the prior art is solved. The steam generation device comprises a spiral pipe heat exchanger, an atomization device and a heat transfer plate. Clear water enters a heat exchange pipe of the spiral pipe heat exchanger in a preheating chamber through a water inlet pipe to exchange heat with flue gasoutside the pipe; the clear water is preheated, and the preheated clear water enters a water spraying device through a water outlet pipe; spray heads spray the water onto the heat transfer plate in aheat exchange chamber; and the flue gas heats the water through the heat transfer plate to form steam, and accordingly the waste heat in the flue gas is recycled. The waste heat in the flue gas is fully absorbed through two times of heat exchange, and the steam generation device utilizing the waste heat of the boiler has the wide application prospects in the field of utilization of waste heat ofboilers.