Channel steel supporting mechanism for roadbed laying

The utility model relates to the technical field of road construction, in particular to a roadbed laying channel steel supporting mechanism, a drawing handle is arranged at the center of the front face of a positioning plate, a plurality of sets of limiting inserting grooves are symmetrically formed in the side, facing a channel steel body, of the positioning plate in the left-right direction, and a plurality of sets of fixing blocks at equal intervals are fixed to the top of a supporting bottom plate. The top of the fixing block is connected with extrusion springs in a front-back symmetry mode, the tops of the extrusion springs are connected with downward pressing bases in a sleeved mode, the tops of the downward pressing bases are provided with a supporting top plate, and the left side and the right side of the top of the supporting top plate are both provided with connecting side plates. The device can support and correct the interior of the channel steel, avoids the problem of laying inclination, is conve