Quickly-mounted C-shaped steel structure

The utility model relates to the technical field of C-shaped steel, in particular to a rapidly-installed C-shaped steel structure which comprises an installation plate, the interior of the installation plate is fixedly connected with a plurality of vertical rods, the outer sides of the vertical rods are fixedly connected with guide rods, the two sides of the top of the installation plate are attached to first C-shaped steel and second C-shaped steel respectively, and the first C-shaped steel and the second C-shaped steel are fixed through screwing screws. The threaded rod drives the threaded block to move upwards, the threaded block drives the guide blocks on the two sides to move upwards, the guide blocks on the two sides slide upwards along the outer wall of the vertical rod, meanwhile, the round block is driven to move upwards, the round block drives the sliding block to move outwards, and the sliding block drives the limiting rod to slide outwards along the outer wall of the guide rod. The limiting rods a