Foundation pit supporting device for building construction

The utility model discloses a foundation pit supporting device for building construction, and relates to the technical field of building construction. Comprising a bottom plate, a lifting mechanism is mounted in the middle of the upper surface of the bottom plate, a mounting frame is fixedly mounted on the upper surface of the lifting mechanism, first rectangular sleeves are mounted on the left side wall and the right side wall of the mounting frame through first locking bolts correspondingly, and manual linear modules are fixedly mounted in the first rectangular sleeves correspondingly; second rectangular sleeves are fixedly mounted on sliding tables of the manual linear modules correspondingly, mounting plates are fixedly mounted at the ends, away from the mounting frame, of the second rectangular sleeves correspondingly, and supporting plates are mounted on the mounting plates through locking mechanisms correspondingly. According to the supporting device, the first rectangular sleeve and the supporting pla