Tunnel cable mounting bracket connecting structure

The utility model discloses a tunnel cable installation support connecting structure, which relates to the technical field of cable tunnels and comprises an arc-shaped framework tightly attached to the inner wall of a tunnel, and the arc-shaped framework is composed of an upper arc stand column and a lower arc stand column which are equal in radius. The upper arc stand columns and the lower arc stand columns are each composed of parallel circular rings and a first C-shaped groove fixedly connected between the two circular rings, first buckling boxes are arranged at the joints of the upper arc stand columns and the lower arc stand columns, second buckling boxes are arranged at the joints of the two upper arc stand columns, the first jackscrews abut against the bottom faces of the second buckling boxes, and the second jackscrews abut against the bottom faces of the second buckling boxes. The bottom ends of the two lower arc stand columns are fixedly connected with fixing plates, and second jackscrews are arrang