The utility model relates to a tubular column shears, including casing and left and right shear ram, be provided with the axis on the casing and perforate along the tubular column that upper and lower direction is extended, be provided with on the casing inner with tubular column perforation intercommunication, outer end radially extend to along the tubular column is fenestrate for corresponding tubular column along the fenestrate radial via hole that radially passes through of tubular column on the outer peripheral face of casing. When needs use tubular column shears, make the tubular column enter into the tubular column along radially passing radial via hole and perforate, just realized the assembling process of tubular column shears with the tubular column, do not need to lift this tubular column shears to higher height, be favorable to shortening tubular column shears's installation time like this, win opportunity for whole rescue.