Disclosed is a dividing wall distillation column for producing high-purity 2-ethyl hexanol that includes a condenser, a reboiler and a main column having a dividing wall, where the main column is divided into a column-top zone, an upper feed zone, an upper outflow zone, a lower feed zone, a lower outflow zone and a column-bottom zone, a raw material flows in a middle inflow plate in which the upper feed zone and the lower feed zone come in contact with each other, a low boiling point component flows out from the column-top zone, a high boiling point component flows out from the column-bottom zone, and a middle boiling point component flows out through a middle outflow plate in which the upper outflow zone and the lower outflow zone come in contact with each other, and the middle boiling point component is 2-ethyl hexanol.