The invention provides a desulfurization absorption tower device which comprises a desulfurization absorption tower, a demister washing spraying layer, a slurry spraying layer and a demister washing water collecting device; the demister washing spraying layer and the slurry spraying layer are arranged in the desulfurization absorption tower; the demister washing water collecting device is used forcollecting demister washing water sprayed by the demister washing spraying layer; the demister washing water collecting device is arranged in the desulfurization absorption tower and is located between the demister washing spraying layer and the slurry spraying layer; and the demister washing water collecting device is provided with a smoke passing hole through which flue gas passes. For the desulfurization absorption tower device, the demister washing water in the desulfurization absorption tower is collected through the demister washing water collecting device, so that the problem that theliquid level of slurry in the desulfurization absorption tower rises caused by the demister washing water, the number of times of slurry discharge of the desulfurization absorption tower is reduced, and the desulfurization efficiency is improved.