Adjustable automatic displacement device for steel member

The invention relates to an adjustable automatic displacement device for a steel member. The adjustable automatic displacement device is characterized in that the device comprises rails (1), a pair of roller carriers (2) is arranged on the rails (1), displacement loops (3) are arranged on the pair of the roller carriers (2), and a plurality of hydraulic jacks (4) are symmetrically arranged on internal walls of the displacement loops (3). With the adoption of the device, the effect on the appearance of a welded joint due to different welding positions of the steel member is eliminated, so that different kinds of welded joints are in a uniform and convenient welding position all the time; the welding quality is improved; the use of hoisting equipment for turning over and displacement of the steel member is reduced; and the turning over and the displacement of the steel member are simplified and are safe.