The invention provides a steel column correcting device and a correcting construction method thereof. The steel column correcting device comprises a fixed connection rod and correcting and clamping parts fixed on steel columns, wherein the number of the correcting and clamping parts is at least two and is adapted to the number of the steel columns; the fixed connection rod is clamped on the correcting and clamping parts; each correcting and clamping part comprises a horizontal adjusting part and a longitudinal adjusting part fixedly connected with each steel column; the fixed connection rod is fixed on the horizontal adjusting parts; and the longitudinal adjusting parts are fixedly connected with the horizontal adjusting parts. The fixed connection rod is utilized to correct a plurality of stand columns on one row simultaneously, so that the problem of correcting high-rise or super high-rise building intensive steel columns is solved. Simultaneously, the fixed balance function of the fixed connection rod is utilized, the fixedly connected stand columns form a stable integrity, and the steel column correcting device plays a temporary fastening and positioning role in construction operation such as followed reinforcing steel bar and moldboard adjustment and concrete pouring, so that the influence of the construction operation on steel column correction is reduced, and the construction operation efficiency is improved.