Universal joint of cable bridge

The invention relates to the field of cable installation of a power supply system, in particular to a universal joint of a cable bridge, which comprises a connecting bridge used for being connected with a branch cable bridge; one end of the connecting cylinder is used for being detachably connected with the side wall of the trunk cable bridge, the other end of the connecting cylinder is connected to the side wall of the connecting bridge and communicated with the interior of the connecting bridge, and a through hole for a cable to reach the connecting cylinder from the trunk cable bridge is formed in the side wall of the trunk cable bridge; and the connecting assembly is arranged at one end, far away from the connecting bridge, of the connecting cylinder and is used for connecting the connecting cylinder to the main cable bridge. The cable bridge has the advantages that on the basis that an existing trunk cable bridge is not changed, the branch cable bridge can be installed, and cable waste cannot be caused w