Height limiting device

The invention belongs to the technical field of power system construction support equipment, and discloses a height limiting device. The height limiting device comprises a first clamping mechanism, a second clamping mechanism and an alarm, the first clamping mechanism comprises a first cross beam frame and a first hoop assembly; the second clamping mechanism comprises a second cross beam frame and a second hoop assembly, the second cross beam frame and the first cross beam frame are connected end to end to form a four-side frame, the four-side frame is used for being arranged on the periphery of a telegraph pole in a sleeving mode, the first hoop assembly and the second hoop assembly are movably arranged on the opposite frame walls of the four-side frame correspondingly, the first hoop assembly and the second hoop assembly can get close to each other or get away from each other so as to hold or loosen the telegraph pole; the alarm is mounted on the four-side frame. The first hoop assembly and the second hoop