Monitoring device for surface heat treatment of metal structure

The utility model relates to a monitoring device for surface heat treatment of a metal structure, which comprises a base, a machine body and a monitoring device, and a telescopic component and a mounting component are arranged in the machine body; the telescopic assembly comprises a positioning seat fixedly mounted on the inner wall of the machine body, a telescopic air cylinder is fixedly mounted on the side, away from the inner wall of the machine body, of the positioning seat, and a mounting seat is fixedly mounted at the output end of the telescopic air cylinder. According to the monitoring device for surface heat treatment of the metal structure, a shifting rod is pulled to drive an inserting rod to displace and enable a reset spring to deform, at the moment, the inserting rod penetrates through the interior of a mounting base and extends into a mounting frame, then a connecting block and the mounting base are connected in an inserted mode, and therefore the monitoring device is fixed; at the moment, a r