Bolt and profile fastening structure

The utility model provides a fastening structure of a bolt and a sectional material. The fastening structure comprises a bolt assembly and the sectional material. A section bar mounting hole with two through ends is formed in the section bar, and the section bar mounting hole is perpendicular to the curved surface mounting surface of the section bar; the bolt assembly comprises a bolt and a threaded plate capable of preventing the bolt from continuously moving towards the position below the profile mounting hole, the bolt penetrates through the profile mounting hole, and the end, located above the profile mounting hole, of the bolt is connected with the threaded plate; a transverse clearance space for the bolt to transversely move is reserved between the inner wall of the profile mounting hole and the bolt; a blocking step capable of preventing the bolt from continuously moving towards the upper part of the profile mounting hole is also arranged on the outer wall of the bolt below the mounting hole in the rad