Municipal bridge height limiting device

The utility model discloses a municipal bridge height limiting device which comprises an installation frame, a lifting assembly is arranged on the installation frame, a height limiting rod is connected to the lifting assembly and drives the height limiting rod to vertically ascend and descend, and a rotatable force unloading assembly is arranged at the bottom of the height limiting rod. According to the height limiting device, through the arrangement of the rotatable force unloading assembly, when the force unloading assembly is subjected to collision impact from a vehicle, collision impact force can be buffered and unloaded through the rotation effect of the force unloading assembly, and after the force unloading assembly is affected by large impact force, the height limiting rod is pushed to move upwards, so that the height limiting rod is pushed to move upwards; and the height of the height limiting rod is increased, the phenomenon that the height limiting rod and the vehicle are excessively damaged is pre