Road foundation pit supporting structure for municipal engineering

The utility model discloses a road foundation pit supporting structure for municipal engineering, which comprises a mounting bottom plate, a mounting plate is arranged on one side of the mounting bottom plate, the mounting plate is movably connected with the mounting bottom plate through a connecting pin, an expansion plate is arranged on the mounting plate, three groups of connecting rods are arranged on the expansion plate, and the two groups of connecting rods are arranged on the mounting plate in a penetrating manner. A supporting assembly is arranged between the expansion plate and the mounting bottom plate, a stabilizing assembly is arranged on the expansion plate, connecting assemblies are arranged on the mounting plate and the expansion plate, and when a foundation pit is deep and the wall of the foundation pit is long, the distance between the expansion plate and the mounting plate can be directly adjusted, so that the contact area between the device and the wall of the foundation pit is adjusted; th