Steel cable tensioning device for building construction

The invention relates to the technical field of steel cable tensioning devices, in particular to a steel cable tensioning device for building construction. The steel cable tensioning device for building construction comprises a main plate, the two ends of the main plate are each provided with a U-shaped plate, the two U-shaped plates are symmetrically distributed, central shafts are arranged in the middle parts of the U-shaped plates in a penetrating mode, one end of each central shaft extends into the main plate, springs and clamping cylinders are arranged on the central shafts in a sleeving mode, the other ends of central shafts are fixedly connected with ring bodies, square holes are formed in the main plate, and the springs and the clamping cylinders are arranged in the square holes of the main plate. By means of the structural design of the steel cable tensioning device for building construction, double working modes of the whole tensioning device are achieved, one mode is that the tensioning device bear