The invention discloses a tri-n-butylamine production device with dividing-wall distillation columns. The tri-n-butylamine production device with the dividing-wall distillation columns comprises a fixed bed reactor, a first heat pump, a first heat exchanger, a first dividing-wall distillation column, a second heat exchanger, a second heat pump, a second dividing-wall distillation column and a third heat exchanger, wherein the first dividing-wall distillation column and the second dividing-wall distillation column are in the identical structure including that the middle of a distillation columncavity is provided with a vertical dividing wall which divides the middle of the distillation column cavity into a feeding side and a non-feeding side, both the feeding side and the non-feeding sideare filled with filler, the distillation column cavity above the dividing wall is a distillation section filled with distillation section filler, and the distillation column cavity under the dividingwall is a stripping section filled with stripping section filler. The tri-n-butylamine production device with the dividing-wall distillation columns has the advantages of saving energy and reducing consumption when applied to producing tri-n-butylamine.