This utility model relates to the field of channel steel technology and discloses a high-strength channel steel structure, including a connector, a channel steel structure, and a reinforcing structure. The channel steel structure is installed on the connector, and the reinforcing structure is installed on the channel steel structure. The reinforcing structure includes a reinforcing block, a first sliding groove, a guide rail, threaded holes, a support block, a second sliding groove, and a screw. The reinforcing block is slidably connected to the guide rail via the first sliding groove. Third bolts are installed on both sides of the top of the reinforcing block. Threaded holes are evenly spaced at the top of the channel steel. The guide rail is fixedly installed on the inner wall of the reinforcing block. The support block is slidably connected to the guide rail via the second sliding groove. One end of the screw is rotatably connected to the support block, and a turntable is fixedly installed on the end of the screw away from the support block. This utility model, through the reinforcing structure, allows the screw to move by rotating the turntable, enabling the support block to slide and adjust along the guide rail. This allows for dynamic adjustment of the support force according to actual load requirements, and can more accurately match the stress state of the channel steel.