The invention discloses a modular assembly type steel underpinning device for concrete column underpinning and belongs to the building integral shifting technical field. The modular assembly type steel underpinning device mainly aims at solving the problems that the concrete column underpinning is high in cost, low in efficiency and unsafe. A pair of underpinning steel beams and a pair of modular assembly type connecting short beams are placed on the bilateral sides of an underpinned column respectively, wherein the underpinning steel beams comprise a plurality of columns of bolt holes; four sides of a concrete column are clamped through pre-tightening bolts; part of column loads borne through a short beam which is hung in the air are transferred to the underpinning steel beams through two end portions of the short beam which is hung in the air after the concrete column and a foundation are cut off and separated from each other; loads transferred from the underpinned column are transferred to a lower rail and the foundation through travelling mechanisms which are arranged on the lower portions of the underpinning steel beams respectively. According to the modular assembly type steel underpinning device for the concrete column underpinning, the use is safe and reliable, block assembly is achieved, repeated use can be achieved, installation and detachment are rapid, the construction speed is high, and the concrete column underpinning structure is green and economic.