Anti-theft alarm for safety protection of construction site

The utility model relates to the technical field of anti-theft alarm equipment, and discloses an anti-theft alarm for safety protection of a construction site, which comprises a base, a shell is arranged on the top surface of the base, a clamping plate is fixedly connected to the top surface of the base, an annular plate is fixedly sleeved on the outer surface of the shell, and the outer surface of the annular plate is movably clamped with the clamping plate. A round hole and a first threaded hole are formed in the side face of the annular plate and the side face of the clamping plate correspondingly, and a threaded rod is connected to the inner surface of the first threaded hole in a threaded and sleeved mode. According to the anti-theft alarm for safety protection of the construction site, a clamping plate is fixedly connected to the top face of the base, an annular plate is fixedly connected to the outer wrapping face of the shell, positioning in the left-right direction is achieved by sleeving the annular