Foundation pit supporting structure for constructional engineering

The utility model relates to the technical field of supporting structures, in particular to a building engineering foundation pit supporting structure which comprises a supporting assembly, the supporting assembly comprises a bottom plate, two supporting blocks are symmetrically welded to the right side of the upper surface of the bottom plate, and a rotating shaft is rotationally connected between the opposite sides of the two supporting blocks through bearings. A supporting plate is welded to the outer side wall of the rotating shaft. The rotating handle is rotated to drive the screw to rotate, the T-shaped block can be driven to slide on the inner side wall of the T-shaped groove, the T-shaped block drives the bottom end of the transmission rod to move, and therefore the supporting plate can be driven to rotate, the inclination angle of the supporting plate is changed, the threaded rod is rotated clockwise to drive the movable plate and the supporting plate to be close to the supporting plate, and the supp