Simple cantilever pre-assembling device

The utility model discloses a simple cantilever pre-assembling device, which relates to the technical field of cantilever pre-assembling and comprises a supporting structure and a positioning structure. The support structure comprises a frame body a and a frame body b which are arranged side by side and have the same structure; each of the frame body a and the frame body b comprises a cross rod and two A-shaped frames; the side wall of the bottom of the cross rod is fixed at the tops of the two A-shaped frames; the positioning structure comprises a plurality of U-shaped plates, and the U-shaped plates are installed at the top end of one transverse rod at intervals. The side wall of the U-shaped plate is fixedly connected with a nut, and the inner side wall of the nut is in threaded connection with a positioning bolt. When the cantilever is pre-assembled, the process of manually carrying materials is reduced, the burden of workers is relieved, a plurality of groups of cantilevers can be installed at the same t